Mares Avanti Excel

Mares Avanti Excel
Mares – Mares Avanti Excel

Mares Avanti Excel. Following numerous tests on new materials in the field and in the lab, and after intense computer simulations, the Mares Avanti Excel was born.The Super Channel Thrust makes it possible to channel the water and optimize thrust in comparison to other fins of similar size.The elastic OPB system ensures that the blade is always at an optimal angle during both the upward and downward strokes, thus considerably encreasing efficiency.The whale fin section in the foot pocket allows for greater transmission of power, with improved sensitivity when finning.The consequent advantage is greater thrust with the same effort.

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C4 Fuego 40 T700 Vgr Carbon Fins + Nylon Fins Bag

C4 Fuego 40 T700 Vgr Carbon Fins + Nylon Fins Bag
C4 – C4 Fuego 40 T700 Vgr Carbon Fins + Nylon Fins Bag

C4 Fuego 40 T700 Vgr Carbon Fins + Nylon Fins Bag. Top fiber quality : MEGAFORCE T 700In the fins FUEGO VGR the use of the new fibre MEGAFORCE T 700, HT type yarn (Hight Tensile), allows, thanks to its resistance of 40% more in comparison with the standard yarn T300 and the same elastic module (Tensile Modulus), to considerably improving the resistance to break of fins.In order to understand which importance has, with the purpose to resist breaking, a fibre with more resistance and with the same elastic module, as MEGAFORCE T 700, it is enough to consider which are the stresses and how they are distributed. The beginning of a blade break occurs when, for too much bending, the material is stressed with a least curve ray, exceeding the resistance values. If we suppose a blade section and the stresses on the different layers or sheets are analysed, we discover that during the bending the exterior sheet has a curve ray larger than the sheet that is on the internal side of the blade. The external sheet is so subjected to bending and traction, its opposite side to bending and compression. The sheet that will be placed in the middle of the section will be stressed only to bending.With these stresses, the blade will start breaking when the external layer, the one more subjected to traction, stands no more applied stress. If this layer or sheet has a resistance higher of 40%, it will occur that it starts breaking for traction charges higher of 40%.It is therefore essential that these layers or sheets (the ones external of the blade) have a strong resistance. The resistance of a sheet is improved through two parameters: the physical dimension of the blade (large and/or heavy clothes) and yarns with high resistance, as MEGAFORCE T 700 .The yarn MEGAFORCE T 700 has a percentage stretch to break of 2,1%, in comparison with 1,5% of the standard T300. This improves the flexibility and the resistance to break too; thanks to this a more accentuated fold of the fins can be reached.It is important, both for resistance that for bending, that the yarn MEGAFORCE T 700 has got a standard elastic module as T300. A higher elastic module would make the fin very stiff. A stiff fin doesnt bend and therefore it would not work, as it ought to do. In order to reduce the stiffness of the blade and allow its bending, thinner sheets (light cloth) and so less resistant should be used. This is the reason that makes unsuited the use of yarns HM (Hight Modulus) and light clothes for the manufacture of fins.The carbon blades C4 are composed by more fibre layers and have a progressive lamination to get the required and needed parabolic bending curve.Among the many possible ones, the ideal parabolic curve is the one that water density naturally imposes to fish, this is the more functional for our purpose. If we notice a swimming fish, we will remark as its head (for us the foot) is substantially firm, while the body is bending, more and more approaching to the tail, in an always more marked way. The bending line of the fish is so parabolic, also if at a summary look it seems only the tail is bending. In the fish, as in the fin, all concerned surface is bending, less towards the head (our foot) and more in the last part of the tail (the blade end) with a bending typical of parabola (a simple parabolic function is x = y2). If we consider a blade, as it was a shelf embedded in the foot and subjected to a uniformly distributed charge, we will remark that the section further and further from the foot bend only if the previous ones support them, that is the first ones should bend less. A blade visibly bending next to the feet will not allow to the last stroke to work in the best way, getting so only a partial exploitation of its dimension features.So, this kind of blades cannot work fully in a parabolic way, it is wrong to say it, but on the contrary in a quite uniform way and this is the opposite of a common believing supported by summary observations and bad information. A blade working with a quite uniform bending surely doesnt follow the fish swimming, to which it is certainly not taught how to bend in an efficient way the fins. The blades C4 FUEGO VGR stretches until the foot heel, allowing so the most energy.The blades C4 FUEGO VGR have the most stressed section increased of 15%. Furthermore the position of the fastening screws has been expressly moved away from the blade fold to make void the effect of hole notches. The combination of the increased resistant section, of the lack of holes on the stressed section and of the change of lamination of the blades C4 FUEGO VGR allowed the reaching in laboratory tests of a resistance to break more than 40% in comparison with standard type blades.The very good sport results got by the blades C4, since 1990 until today, are the sure guarantee of the performances of our products and of the correctness of our technical choices.In FUEGO VGR the flap shape of the blade end (patent C4) allows better parabolic bending curves, less energy absorptions and more efficacious water flows detachment from the blade (for more information see the page fins C4 FLAP).VGR – Variable Geometry RailsThe water rails, invented by C4 in 1994, play the role to control, canalising it, the water on the blade. They make the swim with fins stable, the fin moves as led on two rails; the performances are enhanced by the total lack of `derapage` effect.In plain breath-held diving, where the performance is executed in controlled conditions, in quiet waters, in a straight path with constant charges, the performance is obtained with the matching of least energy consumption and highest speed.The requirements for fishing are different, because an easy handling, a sudden spring and variable charges, due both to fishing needs and changing sea weather conditions, are required.Therefore the main thing requested to fins is their adaptability to the changing work conditions to which they are subjected. As we know, the improvement of performance is always reached by adjusting in specific way the features of the tool, to the action needs. Changing needs require modifications in the equipment. Only one thing good for all means to be satisfied with common performances and this is not our philosophy.The water rails VGR (Variable Geometry Rails) let in a new concept in the system of control on the amount of water worked by fins. By them the canalisation of water flows is progressively modified according to the area and the fold of the blade, improving the performances.We know that, owing to the move led by the foot on the fins, the speed of water running on the blade is increased, passing from the foot to the blade end. It is this that provokes the propulsory push of the fins. With the water rails VGR, water amounts worked are progressively modified, following the speed changes of this in the progressive sections of the blade. A further advantage given by the water rails VGR is they take at work a special shape of the L sections, strongly reducing the rips between the layer of moving water on the blades, in comparison with the static one of the sea. The water amount worked by the water rails changes according to their dimensions. Low water rails work little water, if high they work more. With the same conditions of materials, surfaces and applied energy, more is the worked water, stronger is the push. It is for this that long blades pushes more than short ones, because they work more water.With the same conditions, the worked water becomes the one controlled by the water rails, that are useful the largest possible, to work the maximum of water, this consistently with the elastic response of materials, hardness, geometries and dimensions of the fins. Task of the designer is to amalgamate materials, stresses and dimensions to get low consumptions of oxygen and high speeds.Therefore the water rails VGR have the largest possible dimensions for each section of the fins, to make the maximum possible quick the worked water amounts.What is useful, where and when it is useful, it is so that higher speeds and energy saving are obtained, as it is with the water rails VGR.Energy transmission: foot blade positionWhat is the best position for the foot related to the blade, and vice versa-Answering this question calls for a careful observation of strain application and of how movement is executed, both for the foot and the blade.In the fins, the shoe defines the reciprocal position of foot and blade, the components it connects.Some technical features affecting the reciprocal foot and blade positions are unavoidable, others are modifiable. For man its natural to lean against the lower part of metatarsus for applying an effort, like for example against bike pedals, climbing a staircase steps or running. That spot of the foot is where its possible to naturally apply maximum strength and maximum movement, that is to exert maximum work with legs (work = force x movement).The fin blade is mechanically classifiable as a bracket submitted to a load homogeneously distributed. So its possibly to identify, depending on bending, a centre of gravity point of the load applied and its distance from the bracket joint position, in our case where the blade bends, exiting from the shoe.The fulcrum effect to which the load produced by blade movement is applied can be computed as the distance between the projections, on the theoretical advancement axis in a submerged diver, or longitudinal axis, of the metatarsal points and the gravity point of the load applied to the blade. This effect is in direct proportionality to the resistance a diver has to overcome in moving the blade.The lesser this distance, the lesser the effort. In C4 FUEGO VGR, with the foot advanced on the blade by 7 cm (compared to standard foopocket) the reduction of the fulcrum effect is above 20%, with all the following advantages in reducing the energy required.The stiffness variation between 25 and 30 blades, for example, its almost 15%. So using FUEGO VGR 30 will require an amount of energy similar to that required by a FALCON 25, with undeniable advantages in acceleration, speed and safety.Hydrodynamics: blade position and angleMinimum hydrodynamic resistance is obtained when a diver, in vertical position, head up, with completely extended fins, observed from a lateral point of view, has in a single axis all articulation theoretical rotation centres: hip, knee, ankle, metatarsus and fin blades.This is possible only if the blade is placed as in C4 FUEGO VGR, just under foot metatarsus, with the appropriate wide angle, over 23° in C4 FUEGO VGR.On the opposite, traditional footpockets and/or blades with narrower angles, force fins away from the body axis. The diver will be compelled to arch his/her back when swimming (by necessity a symmetrical movement) for moving in a straight line.Arching the back increases the diver frontal section and increases the hydrodynamic resistance. Both the arching and the increase of the resistance subtract energy, detrimental on both dive time and safety.When the angle between the diver axis and the fins axis is too wide its possible to have damages to articulations as knees and ankles. Its plainly impossible with C4 FUEGO VGR; the ergonomics is at its maximum.C4 FUEGO VGR fin is produced taking in account hydrodynamics requirements both because it has thoroughly rayed shapes and a close outline in its shoe, and because it lacks side stiffeners. Without side stiffeners it has been possible to distinctly reduce the shoe frontal section, in the same way reducing related hydrodynamic resistances.Right and Left anatomic shoe.How well a fin fits is an essential feature to the effectiveness of it. The shoe, not anymore simply footpocket, is the primary component in the cinematic chain of energy transmission from the foot to the blade: better the connection, more energy will be transferred to the movement. A freediving fin has an optimal performance if the shoe has good ergonomics, if it fits perfectly to the foot. For this reason we produced anatomic right and left shoes, with a customable regulation of the shoe lacing.A single footpocket, somewhat constricting the foot or letting it free to partially move inside it, has been so far the usual conditions every diver had to deal with, choosing between how much pain to endure or how much energy to disperse.C4 FUEGO VGR simply eliminates at the origin all these problems: they significantly improve how well it fits, giving more comfort and effectiveness to the athletic motion. For obtaining the best ergonomics, C4 shoe has been shaped from the best running shoes, revised to fit freediving divers requirements.Optimal C4 shoe anatomy allowed the use of a strong polymer, so guaranteeing an excellent energy transmission without reducing comfort.The shoe has been planned with different thicknesses, obtaining different resilience in various portions and optimizing energy transmission.The choice to produce shoes without traditional side stiffeners moved the fins centre of gravity toward the foot, making them significantly lighter when swimming.Energy absorption due to side stiffeners in traditional fins has been measured in tests developed in the Engineering Department of Padua University, and it resulted to be of 55% in the hysteresis loop. In C4 FUEGO VGR this energy is not squandered in the shoe, with an obvious benefit in performance.Its easy for all to appreciate the superior comfort due to the anatomic right and left shoe compared to the traditional fin with an identical footpocket for both feet.Shoelacing adjustment.Its easy to obtain a fine custom adjustment of the shoelacing, using the elastic strings C4 FUEGO VGR are provided with. This gives the best possible fit for every foot. Its a system very similar to the one were used to with land shoes: right and left shoes, with laces to tie them up.For the foot, underwater or on land, comfort and energy transmission are exactly the same. Having the possibility to custom adjust the attachment pressure is the maximum a freediver could ask to his/her fins!The lace operates on five points and the adjustment has to be done only once, on land. When decided the attachment pressure and tied up the lace with a knot (see assembly instructions) the diver can forget about it and use C4 FUEGO VGR exactly like all other fins, putting them on and taking them off like its used to.Thanks to the possibility to loosen and tighten at will the shoes it will be possible, changing only the laces, to use thicker or thinner socks, adapting C4 FUEGO VGR to the vagaries of temperature seasons.This system of adjustment, with an elastic lace, has been selected after testing countless solutions. Zips, buckles, numerous kinds of fastenings, Velcro: no one of those, for a multiplicity of reasons, offered better results than elastic lace.Its a solution simple, practical, easy to cope with even if therere problems in a far away island, its enough a piece of rope. Its not metal and it will not rust, its not a device and itll not get stuck, it has not springs, itll not open by accident, it does not carve the shoe polymer, its very light, it spreads out the pressure onto five points, allows an elastic distribution of effort, its truly reliable, its an extremely marine solution and its really inexpensive, a good thing above all this. If the lace breaks up when diving the breaking point will be forcedly in a stretch of it. The friction the remaining portion of it still exerts on other insertion points will prevent the sudden unfastening of the attachment: the diver can so continue to swim in great safety.C4 carbon blades are composed by many layers of fibers and have a progressive lamination for obtaining the required parabolic bending curve. Being bended, external layers are submitted to biggest strains. Therefore the whole blade resilience to the start of breaking greatly depends on the external layer resilience and the blade section involved.C4 FUEGO VGR blades have section resilient to breaking increased by 15%. Moreover the position of fastening screws has been appositely moved away from the blade bend so to cancel the effect of the holes drilled in it.The combination of increasing the resilient section, of non drilling holes in the section under strain and of altering the blade lamination, allowed, in lab tests, the reaching of fracture resilience better than 40% compared to C4 Falcon blade, already so many times put to test.The excellent sports results obtained with C4 blades are a sure guarantee of performances by our products and suitability of our technical choices.C4 FUEGO VGR blade prolong till the heel so to assure maximum energy transmission. Blade measures are 800 x 190 mm. Traditional blades are not compatible with C4 shoes, first because the joint is different and second because theyre not resilient enough, having been planned to use with side stiffener footpockets.C4 FUEGO VGR are assembled with mounting screws, without any glue so to have the best portability.C4 shoes right and left, are provided in five sizes:European sizes: 39/40 – 41/42 – 43/44 – 45/46 47/48US/Canada sizes: 7-7 – 8-8 – 11 -12 – 13-13UK sizes: 6-7 – 7-8 – 8-10 – 11-11 – 12-13C4 FUEGO VGR 25 soft 800 x 190 mmC4 FUEGO VGR 30 medium 800 x 190 mmC4 FUEGO VGR 40 hard 800 x 190 mmAll the C4 products are made 100% with carbon tissue MEGAFORCE T700

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Omer Stingray Carbon Blade (1 Pcs)

Omer Stingray Carbon Blade (1 Pcs)
Omer – Omer Stingray Carbon Blade (1 Pcs)

Omer Stingray Carbon Blade (1 Pcs). Features:- The new Stingray Carbon fins feature carbon fiber blades manufactured using the infusion technology with innovative double vacuum process. – - Thanks to this technology the carbon fiber stands are impregnated perfectly in the resin without the risk of forming micro bubbles and with an optimal distribution of the resin itself.- In addition the percentage of necessary resin is reduced considerably more than before with a great increase in performance characteristics ofthe blade.- The specific carbon fiber strand used was developed specifically for the manufacture of freediving fins and patented.- The underlying result is a very comfortable fin, in part thanks to the thermo-rubber foot-pockets, providing high performance to the diver. – Asidefrom not tiring out the divers legs while kicking on the surface for extended periods the Stingray Carbon blades push the diver the most during descents and ascents even in great depths.- The interchangeable blades are available in three degrees of stiffness: 20 soft, 25 medium, and 30 hard.

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C4 Flap T700 Vgr Carbon Blades

C4 Flap T700 Vgr Carbon Blades
C4 – C4 Flap T700 Vgr Carbon Blades

C4 Flap T700 Vgr Carbon Blades. C4 FLAP VGRFLAP, EFFICIENCY IS IN THE SHAPEFLAP VGR blades, patented by C4, are born from the study of underwater behaviour by traditionally shaped blades, like Falcon, compared to the theoretical parabolic model of the blade under load.Traditionally shaped blades, like Falcon, have an inherent limit to their bending that, due both to the minimum functional thickness utilizable for the material and the water quantity worked by each blade section, cannot possibly have that correct bending homogeneity, the most possibly analogous to the perfect parabolic curve C4 is since the beginning searching for its fins.Nature evolved fish in such a way that they assume, while swimming, a bending progressively parabolic from head to tail, exactly for exploiting to the maximum degree the non-compressibility of water.The presence, by now essential in high level fins, of lateral water channelling edges, novelty introduced first of all by C4 itself, leads to an undesired and invariably non-elastic stiffness in the terminal blade segment.This causes a lack of bending in this section (the last 15-20 cm) that, in underwater usage, remains almost perfectly straight. As a proof, look at pictures of underwater swimming divers or, better still, one of many videoclips available. Its easy to notice that the terminal blade section is if not minimally bended: it remains almost perfectly straight, in a very different way from fish when at their maximum bending.The straight terminal section, due to the different inclination by this blade segment compared to the water flow, causes water vortexes on the blade, exactly in the segment that can feel more the slowing effects, because there the fluid flowing velocity is maximum.The blade terminal section moves partially perpendicular to water flows, and its this that produces the negative vortexes. A diver swims like having a sucker adhering on water attached to the blade terminal segment.Its well known water is a non-compressible fluid and this makes more arduous to the movement all those technical situations opposing the movement itself, exactly like the vortex effects produced by a straight and not bent blade terminal section. Water channelling edges enhances this effect because they increase the quantity of water worked by the blade.The specific patented shape C4 gave to FLAP VGR blades adds another plane to the blade itself (the FLAP) on which the water can flow and work, giving finally the parabolic bending searched by C4.Efficiency losses due to vortexes are in this way reduced. Whats more, compared to traditional fins like Falcon, its increased the water flows detachment speed on the blade so to produce less turbulences on the blade terminal portion. All this creates a greater than ever swimming velocity. On FLAP VGR blade, compared to the world wide appreciated Falcon, it has been shortened the blade lateral section, the corners, in such a way to reduce the risk touching the bottom and stucking them in it, lowering the possibility to damage the fins, in whatever material theyre built of.Experience teaches, and logic supports, that blades are mostly broken or damaged in the maximum effort area, near the footpocket, where applied forces concentrate.Its very difficult that terminal FLAP, being positioned in the farthest place away from the maximum strain, can create strength problems to the blade. The reduced area on the blade terminal segment vastly enhances fin manoeuvrability: underwater progress is in this way extremely easy and with low energy consumption. FLAP VGR has the identical and significant angle between foot and blade, about 23°, many times tested on Falcon. Underwater tests demonstrated that FLAP VGR gives performances constantly higher than Falcon, more or less about 15%. A diver can in this way obtain identical performances with lesser energy consumption, improving both dynamic potentials and safety in breath holding dives.Top fiber quality : MEGAFORCE T 700In the fins FLAP VGR the use of the new fibre MEGAFORCE T 700, HT type yarn (Hight Tensile), allows, thanks to its resistance of 40% more in comparison with the standard yarn T300 and the same elastic module (Tensile Modulus), to considerably improving the resistance to break of fins.In order to understand which importance has, with the purpose to resist breaking, a fibre with more resistance and with the same elastic module, as MEGAFORCE T 700, it is enough to consider which are the stresses and how they are distributed. The beginning of a blade break occurs when, for too much bending, the material is stressed with a least curve ray, exceeding the resistance values. If we suppose a blade section and the stresses on the different layers or sheets are analysed, we discover that during the bending the exterior sheet has a curve ray larger than the sheet that is on the internal side of the blade. The external sheet is so subjected to bending and traction, its opposite side to bending and compression. The sheet that will be placed in the middle of the section will be stressed only to bending.With these stresses, the blade will start breaking when the external layer, the one more subjected to traction, stands no more applied stress. If this layer or sheet has a resistance higher of 40%, it will occur that it starts breaking for traction charges higher of 40%.It is therefore essential that these layers or sheets (the ones external of the blade) have a strong resistance. The resistance of a sheet is improved through two parameters: the physical dimension of the blade (large and/or heavy clothes) and yarns with high resistance, as MEGAFORCE T 700.The yarn MEGAFORCE T 700 has a percentage stretch to break of 2,1%, in comparison with 1,5% of the standard T300. This improves the flexibility and the resistance to break too; thanks to this a more accentuated fold of the fins can be reached.It is important, both for resistance that for bending, that the yarn MEGAFORCE T 700 has got a standard elastic module as T300. A higher elastic module would make the fin very stiff. A stiff fin doesnt bend and therefore it would not work, as it ought to do. In order to reduce the stiffness of the blade and allow its bending, thinner sheets (light cloth) and so less resistant should be used. This is the reason that makes unsuited the use of yarns HM (Hight Modulus) and light clothes for the manufacture of fins.The carbon blades C4 are composed by more fibre layers and have a progressive lamination to get the required and needed parabolic bending curve.Among the many possible ones, the ideal parabolic curve is the one that water density naturally imposes to fish, this is the more functional for our purpose. If we notice a swimming fish, we will remark as its head (for us the foot) is substantially firm, while the body is bending, more and more approaching to the tail, in an always more marked way. The bending line of the fish is so parabolic, also if at a summary look it seems only the tail is bending. In the fish, as in the fin, all concerned surface is bending, less towards the head (our foot) and more in the last part of the tail (the blade end) with a bending typical of parabola (a simple parabolic function is x = y2).If we consider a blade, as it was a shelf embedded in the foot and subjected to a uniformly distributed charge, we will remark that the section further and further from the foot bend only if the previous ones support them, that is the first ones should bend less. A blade visibly bending next to the feet will not allow to the last stroke to work in the best way, getting so only a partial exploitation of its dimension features.So, this kind of blades cannot work fully in a parabolic way, it is wrong to say it, but on the contrary in a quite uniform way and this is the opposite of a common believing supported by summary observations and bad information. A blade working with a quite uniform bending surely doesnt follow the fish swimming, to which it is certainly not taught how to bend in an efficient way the fins. The very good sport results got by the blades C4, since 1990 until today, are the sure guarantee of the performances of our products and of the correctness of our technical choices.VGR – Variable Geometry RailsThe water rails, invented by C4 in 1994, play the role to control, canalising it, the water on the blade. They make the swim with fins stable, the fin moves as led on two rails; the performances are enhanced by the total lack of `derapage` effect. In plain breath-held diving, where the performance is executed in controlled conditions, in quiet waters, in a straight path with constant charges, the performance is obtained with the matching of least energy consumption and highest speed.The requirements for fishing are different, because an easy handling, a sudden spring and variable charges, due both to fishing needs and changing sea weather conditions, are required.Therefore the main thing requested to fins is their adaptability to the changing work conditions to which they are subjected. As we know, the improvement of performance is always reached by adjusting in specific way the features of the tool, to the action needs. Changing needs require modifications in the equipment. Only one thing good for all means to be satisfied with common performances and this is not our philosophy.The water rails VGR (Variable Geometry Rails) let in a new concept in the system of control on the amount of water worked by fins. By them the canalisation of water flows is progressively modified according to the area and the fold of the blade, improving the performances.We know that, owing to the move led by the foot on the fins, the speed of water running on the blade is increased, passing from the foot to the blade end. It is this that provokes the propulsory push of the fins. With the water rails VGR, water amounts worked are progressively modified, following the speed changes of this in the progressive sections of the blade. A further advantage given by the water rails VGR is they take at work a special shape of the L sections, strongly reducing the rips between the layer of moving water on the blades, in comparison with the static one of the sea. The water amount worked by the water rails changes according to their dimensions. Low water rails work little water, if high they work more. With the same conditions of materials, surfaces and applied energy, more is the worked water, stronger is the push. It is for this that long blades pushes more than short ones, because they work more water.With the same conditions, the worked water becomes the one controlled by the water rails, that are useful the largest possible, to work the maximum of water, this consistently with the elastic response of materials, hardness, geometries and dimensions of the fins. Task of the designer is to amalgamate materials, stresses and dimensions to get low consumptions of oxygen and high speeds.Therefore the water rails VGR have the largest possible dimensions for each section of the fins, to make the maximum possible quick the worked water amounts.What is useful, where and when it is useful, it is so that higher speeds and energy saving are obtained, as it is with the water rails VGR.To choose hardness bladeFLAP VGR are provided in three different stiffness, 25 soft, 30 medium and 40 hard so to better adapt to several users with a variety of requirements. Blades have to be chosen the softest possible for the job they have to perform. The choice has to be made taking into account the maximum load conditions when leaving the bottom and in the swimming against current. The load situation kicking off the bottom is strictly personal, it depends by body weight, by the amount of lead we have on our belt and by the depth we are. Its also necessary consider how psychologically were used to the depth we reach freediving. We counsel stiffer blades for someone in a hurry to resurface. If we manage well our breath-holding abilities and we have a great deal of tranquillity we could utilize softer fins so to save some amount of oxygen. Has also to be considered that the typical spearfisher, instead of the pure freediver, performs many dives, often with very low recover time between them. Consequently, a rather stiffer blade, even if can somewhat reduce the maximum accessible depth with maximum relaxing, will surely provide more safety.A stiffer fin does not give more depth but surely will burn more oxygen. The velocity permitted by fins is not directly proportional to their stiffness, it depends instead by the mechanic and hydrodynamic efficiency of the man + fins system. Considering this, the blade stiffness is only one of many parameters, and not the more significant. While instead a stiffer blade has better performances and lesser oxygen utilization in our underwater movements, for example leaving the bottom, when it has to bring us from zero velocity, motionless on the bottom, to a constant ascent velocity. While resurfacing, a stiffer blade will burn up more oxygen than a softer one. This one instead will have better performances and lower oxygen consumption in the constant velocity parameters.A traditional technopolymer fin, in its standard version, requires a muscular effort like our FLAP VGR 25, a technopolymer fin in a stiffer version requires a muscular effort harder than our FLAP VGR 40.Every FLAP VGR blade has been permanently marked with the guarantee number on the back of the blade itself.FLAP VGR is covered with a two years guarantee, like all other products under Italian law, following the directions of the European Community.C4 FLAP VGR 25 soft 780 x 190 mmC4 FLAP VGR 30 medium 780 x 190 mmC4 FLAP VGR 40 hard 780 x 190 mmAll the C4 products are made 100% with carbon tissue MEGAFORCE T700.

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Mares Volo Race

Mares Volo Race
Mares – Mares Volo Race

Mares Volo Race. A combination of the exclusive and patented OPB and Channel Thrust systems, for a full-foot fin that fears no rivals. High performance with minimal exertion, maximum comfort and exceptional light weight – a combination that makes diving more enjoyable.Orthopedic foot pocket in soft thermoplastic rubber for maximum efficiency and unparalleled comfort. OPB (Optimized Pivoting Blade) system with expandable inserts for controlling and optimizing the thrust angle. Channel Thrust Technology for perfect routing of the water flow. Rubber covered stabilizers and ribs, provide improved performance.

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C4 Vgr Water Rail For Falcon

C4 Vgr Water Rail For Falcon
C4 – C4 Vgr Water Rail For Falcon

C4 Vgr Water Rail For Falcon. VGR – Variable Geometry RailsThe water rails, invented by C4 in 1994, play the role to control, canalising it, the water on the blade. They make the swim with fins stable, the fin moves as led on two rails; the performances are enhanced by the total lack of `derapage` effect. In plain breath-held diving, where the performance is executed in controlled conditions, in quiet waters, in a straight path with constant charges, the performance is obtained with the matching of least energy consumption and highest speed.The requirements for fishing are different, because an easy handling, a sudden spring and variable charges, due both to fishing needs and changing sea weather conditions, are required.Therefore the main thing requested to fins is their adaptability to the changing work conditions to which they are subjected. As we know, the improvement of performance is always reached by adjusting in specific way the features of the tool, to the action needs. Changing needs require modifications in the equipment. Only one thing good for all means to be satisfied with common performances and this is not our philosophy.The water rails VGR (Variable Geometry Rails) let in a new concept in the system of control on the amount of water worked by fins. By them the canalisation of water flows is progressively modified according to the area and the fold of the blade, improving the performances.We know that, owing to the move led by the foot on the fins, the speed of water running on the blade is increased, passing from the foot to the blade end. It is this that provokes the propulsory push of the fins. With the water rails VGR, water amounts worked are progressively modified, following the speed changes of this in the progressive sections of the blade. A further advantage given by the water rails VGR is they take at work a special shape of the L sections, strongly reducing the rips between the layer of moving water on the blades, in comparison with the static one of the sea. The water amount worked by the water rails changes according to their dimensions. Low water rails work little water, if high they work more. With the same conditions of materials, surfaces and applied energy, more is the worked water, stronger is the push. It is for this that long blades pushes more than short ones, because they work more water.With the same conditions, the worked water becomes the one controlled by the water rails, that are useful the largest possible, to work the maximum of water, this consistently with the elastic response of materials, hardness, geometries and dimensions of the fins. Task of the designer is to amalgamate materials, stresses and dimensions to get low consumptions of oxygen and high speeds.Therefore the water rails VGR have the largest possible dimensions for each section of the fins, to make the maximum possible quick the worked water amounts.What is useful, where and when it is useful, it is so that higher speeds and energy saving are obtained, as it is with the water rails VGR.

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Hollis F1 Bat Fins Black

Hollis F1 Bat Fins Black
Hollis – Hollis F1 Bat Fins Black

Hollis F1 Bat Fins Black. Power without compromise. The Hollis fin blends graceful movement, power, and bulletproof construction. Meet the new standard in diving.- High grade, heavy duty rubber construction.- Angled strap mounts for comfort and a better transition of power. – Spring heel straps w/ easy-grip heel tab. – Multiple strap mounting positions for a fine tuned fit.- Vented blade to reduce stress while accelerating water over the blade.- Generous foot pocket.

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Aqualung Pro Flex Ii Junior

Aqualung Pro Flex Ii Junior
Aqualung – Aqualung Pro Flex Ii Junior

Aqualung Pro Flex Ii Junior. Pro Flex II FinsJunior model Contemporary designed, dual-composite fin for excellent power and styling. Adjustable foot strap to fine tune fit. Long blade with dual-composite fin rails for enhanced snap and thrust. Super-soft and comfortable foot pocket translucent clear blade with black foot pocket.

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Omer Stingray Carbon Camu 3d Blade

Omer Stingray Carbon Camu 3d Blade
Omer – Omer Stingray Carbon Camu 3d Blade

Omer Stingray Carbon Camu 3d Blade. Features:- This new StingRay Carbon version have a special 3D camouflage finish reproducing exactly a typical sea bottom. – This has been possible using the new technology IML, for the first time employed by Omer for the spearfishing equipments. – This technology allows to put a film with the bottom sea picture directly on the carbon surface during the blade molding to assure a high resistance to abrasion. – Available in three degrees of stiffness: 20 (soft), 25 (medium) and 30 (hard).

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Mares Wave Ff Yellow

Mares Wave Ff Yellow
Mares – Mares Wave Ff Yellow

Mares Wave Ff Yellow. – The highest level of performance in all diving conditions- Whale tail design, great power transmission- Anatomical foot pocket- Tri-material for maximum performance- Following several tests on new materials, Mares Lab has created the Avanti Excel, to improve again the performance over the already legendary Plana tradition. – Elastic OPB, Superchannel Thrust, Tri-material technologies and the Whale Tail design all fused into an unique extraordinary fi n, ideal for demanding divers. Features:- Material: Thermoplastic rubber/Technopolymers

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Mares Instinct Pro

Mares Instinct Pro
Mares – Mares Instinct Pro

Mares Instinct Pro. The new evolution of the INSTINCT fin, the INSTINCT PRO is the result of computerdeveloped design and the use of new materials.The tapered-section blade, paired with a new technopolymer, has made it possible to achieve optimum results in terms of both power and thrust modularity.The micro-ribbing on the blade optimizes efficiency.The elongated side ribs have a variable crosssection designed to make the blade deform progressively and create a channeling effect for the water, the true driving force behind the fin.The new shape of the highly-pronounced V blade prevents any risk of slippage.The foot pocket retains all its qualities of comfort and hold for the foot, and at the same time brings even more power to the blade.

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Mares Avanti Quattro Power

Mares Avanti Quattro Power
Mares – Mares Avanti Quattro Power

Mares Avanti Quattro Power. AVANTI QUATTRO POWERThe best all-around full foot fin for diving. The Quattro Power is perfect for warm water divers,snorkelers and free divers that want ultimate power, comfort and speed. The choice of demandingscuba and free divers. Comfort combined with extraordinary performance. Ideal for both scuba, apnea Channel thrust technology foroptimum performance Rubberized side ribsBlade lenght 45.5cm 22.5cm large

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Beuchat X-jet Open

Beuchat X-jet Open
Beuchat – Beuchat X-jet Open

Beuchat X-jet Open. A new generation of ajustable fins made from three different materials.Two side vents in the negative area insure that the flow is guided on both sides of the blade and guarantees a propulsion in the axe. The side gutter effect reduces turbulances in the flow giving more power.A slanted blade gives a powerful whip effect and makes swimming easy.The ultra soft foot pocket is perfectly adapted for the use of modern diving booties.Rubber straps with rotating buckles for quick adjusting.

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Oceanic Caribe Snorkel Vest

Oceanic Caribe Snorkel Vest
Oceanic – Oceanic Caribe Snorkel Vest

Oceanic Caribe Snorkel Vest. Snorkeling vest with signal colour and oral inflation / deflation system.Features:- Type: ADV- Construction: single bladder- Material: NylonSpecifications: – Type: ADV- Material: Nylon- Construction: Single Bladder- Inflator system: No- Backpack: No- Bungees: No- Exhaust valve: No- Belt: No- Cummerbund: No- D-rings: No- Weight pockets: No

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Aqualung Slingshot

Aqualung Slingshot
Aqualung – Aqualung Slingshot

Aqualung Slingshot. Slingshot – a revolutionary fin that will take the dive world by storm.The Slingshot will make diving more comfortable, efficient and fun.Its innovations include Power Bands, Gear Shift and Mid-foot Flex Joint that all add up to provide a wonderful diving experience. Features of Slingshot:-Power Bands: Pure silicone -Gear Shift: 3-speed Gear Shift customizes your speed to effort ratio to fit the specific conditions of your dive. Three different settings are available. Easy to shift during the dive, even with gloves -Mid-foot Flex Joint: The blade is attached to the foot pocket using two Mid-foot Flex Joints. This takes the strain off of the toes and the top of the ankle. The result is a dramatic improvement in comfort. You can now use the entire foot to power the fin rather than just the front half of the foot. Provides the blade a significantly larger range of motion, often up to 5 times that of a conventional fin

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C4 Fuego 25 T700 Vgr Carbon Fins + Nylon Fins Bag

C4 Fuego 25 T700 Vgr Carbon Fins + Nylon Fins Bag
C4 – C4 Fuego 25 T700 Vgr Carbon Fins + Nylon Fins Bag

C4 Fuego 25 T700 Vgr Carbon Fins + Nylon Fins Bag. Top fiber quality : MEGAFORCE T 700In the fins FUEGO VGR the use of the new fibre MEGAFORCE T 700, HT type yarn (Hight Tensile), allows, thanks to its resistance of 40% more in comparison with the standard yarn T300 and the same elastic module (Tensile Modulus), to considerably improving the resistance to break of fins.In order to understand which importance has, with the purpose to resist breaking, a fibre with more resistance and with the same elastic module, as MEGAFORCE T 700, it is enough to consider which are the stresses and how they are distributed. The beginning of a blade break occurs when, for too much bending, the material is stressed with a least curve ray, exceeding the resistance values. If we suppose a blade section and the stresses on the different layers or sheets are analysed, we discover that during the bending the exterior sheet has a curve ray larger than the sheet that is on the internal side of the blade. The external sheet is so subjected to bending and traction, its opposite side to bending and compression. The sheet that will be placed in the middle of the section will be stressed only to bending.With these stresses, the blade will start breaking when the external layer, the one more subjected to traction, stands no more applied stress. If this layer or sheet has a resistance higher of 40%, it will occur that it starts breaking for traction charges higher of 40%.It is therefore essential that these layers or sheets (the ones external of the blade) have a strong resistance. The resistance of a sheet is improved through two parameters: the physical dimension of the blade (large and/or heavy clothes) and yarns with high resistance, as MEGAFORCE T 700 .The yarn MEGAFORCE T 700 has a percentage stretch to break of 2,1%, in comparison with 1,5% of the standard T300. This improves the flexibility and the resistance to break too; thanks to this a more accentuated fold of the fins can be reached.It is important, both for resistance that for bending, that the yarn MEGAFORCE T 700 has got a standard elastic module as T300. A higher elastic module would make the fin very stiff. A stiff fin doesnt bend and therefore it would not work, as it ought to do. In order to reduce the stiffness of the blade and allow its bending, thinner sheets (light cloth) and so less resistant should be used. This is the reason that makes unsuited the use of yarns HM (Hight Modulus) and light clothes for the manufacture of fins.The carbon blades C4 are composed by more fibre layers and have a progressive lamination to get the required and needed parabolic bending curve.Among the many possible ones, the ideal parabolic curve is the one that water density naturally imposes to fish, this is the more functional for our purpose. If we notice a swimming fish, we will remark as its head (for us the foot) is substantially firm, while the body is bending, more and more approaching to the tail, in an always more marked way. The bending line of the fish is so parabolic, also if at a summary look it seems only the tail is bending. In the fish, as in the fin, all concerned surface is bending, less towards the head (our foot) and more in the last part of the tail (the blade end) with a bending typical of parabola (a simple parabolic function is x = y2). If we consider a blade, as it was a shelf embedded in the foot and subjected to a uniformly distributed charge, we will remark that the section further and further from the foot bend only if the previous ones support them, that is the first ones should bend less. A blade visibly bending next to the feet will not allow to the last stroke to work in the best way, getting so only a partial exploitation of its dimension features.So, this kind of blades cannot work fully in a parabolic way, it is wrong to say it, but on the contrary in a quite uniform way and this is the opposite of a common believing supported by summary observations and bad information. A blade working with a quite uniform bending surely doesnt follow the fish swimming, to which it is certainly not taught how to bend in an efficient way the fins. The blades C4 FUEGO VGR stretches until the foot heel, allowing so the most energy.The blades C4 FUEGO VGR have the most stressed section increased of 15%. Furthermore the position of the fastening screws has been expressly moved away from the blade fold to make void the effect of hole notches. The combination of the increased resistant section, of the lack of holes on the stressed section and of the change of lamination of the blades C4 FUEGO VGR allowed the reaching in laboratory tests of a resistance to break more than 40% in comparison with standard type blades.The very good sport results got by the blades C4, since 1990 until today, are the sure guarantee of the performances of our products and of the correctness of our technical choices.In FUEGO VGR the flap shape of the blade end (patent C4) allows better parabolic bending curves, less energy absorptions and more efficacious water flows detachment from the blade (for more information see the page fins C4 FLAP).VGR – Variable Geometry RailsThe water rails, invented by C4 in 1994, play the role to control, canalising it, the water on the blade. They make the swim with fins stable, the fin moves as led on two rails; the performances are enhanced by the total lack of `derapage` effect.In plain breath-held diving, where the performance is executed in controlled conditions, in quiet waters, in a straight path with constant charges, the performance is obtained with the matching of least energy consumption and highest speed.The requirements for fishing are different, because an easy handling, a sudden spring and variable charges, due both to fishing needs and changing sea weather conditions, are required.Therefore the main thing requested to fins is their adaptability to the changing work conditions to which they are subjected. As we know, the improvement of performance is always reached by adjusting in specific way the features of the tool, to the action needs. Changing needs require modifications in the equipment. Only one thing good for all means to be satisfied with common performances and this is not our philosophy.The water rails VGR (Variable Geometry Rails) let in a new concept in the system of control on the amount of water worked by fins. By them the canalisation of water flows is progressively modified according to the area and the fold of the blade, improving the performances.We know that, owing to the move led by the foot on the fins, the speed of water running on the blade is increased, passing from the foot to the blade end. It is this that provokes the propulsory push of the fins. With the water rails VGR, water amounts worked are progressively modified, following the speed changes of this in the progressive sections of the blade. A further advantage given by the water rails VGR is they take at work a special shape of the L sections, strongly reducing the rips between the layer of moving water on the blades, in comparison with the static one of the sea. The water amount worked by the water rails changes according to their dimensions. Low water rails work little water, if high they work more. With the same conditions of materials, surfaces and applied energy, more is the worked water, stronger is the push. It is for this that long blades pushes more than short ones, because they work more water.With the same conditions, the worked water becomes the one controlled by the water rails, that are useful the largest possible, to work the maximum of water, this consistently with the elastic response of materials, hardness, geometries and dimensions of the fins. Task of the designer is to amalgamate materials, stresses and dimensions to get low consumptions of oxygen and high speeds.Therefore the water rails VGR have the largest possible dimensions for each section of the fins, to make the maximum possible quick the worked water amounts.What is useful, where and when it is useful, it is so that higher speeds and energy saving are obtained, as it is with the water rails VGR.Energy transmission: foot blade positionWhat is the best position for the foot related to the blade, and vice versa-Answering this question calls for a careful observation of strain application and of how movement is executed, both for the foot and the blade.In the fins, the shoe defines the reciprocal position of foot and blade, the components it connects.Some technical features affecting the reciprocal foot and blade positions are unavoidable, others are modifiable. For man its natural to lean against the lower part of metatarsus for applying an effort, like for example against bike pedals, climbing a staircase steps or running. That spot of the foot is where its possible to naturally apply maximum strength and maximum movement, that is to exert maximum work with legs (work = force x movement).The fin blade is mechanically classifiable as a bracket submitted to a load homogeneously distributed. So its possibly to identify, depending on bending, a centre of gravity point of the load applied and its distance from the bracket joint position, in our case where the blade bends, exiting from the shoe.The fulcrum effect to which the load produced by blade movement is applied can be computed as the distance between the projections, on the theoretical advancement axis in a submerged diver, or longitudinal axis, of the metatarsal points and the gravity point of the load applied to the blade. This effect is in direct proportionality to the resistance a diver has to overcome in moving the blade.The lesser this distance, the lesser the effort. In C4 FUEGO VGR, with the foot advanced on the blade by 7 cm (compared to standard foopocket) the reduction of the fulcrum effect is above 20%, with all the following advantages in reducing the energy required.The stiffness variation between 25 and 30 blades, for example, its almost 15%. So using FUEGO VGR 30 will require an amount of energy similar to that required by a FALCON 25, with undeniable advantages in acceleration, speed and safety.Hydrodynamics: blade position and angleMinimum hydrodynamic resistance is obtained when a diver, in vertical position, head up, with completely extended fins, observed from a lateral point of view, has in a single axis all articulation theoretical rotation centres: hip, knee, ankle, metatarsus and fin blades.This is possible only if the blade is placed as in C4 FUEGO VGR, just under foot metatarsus, with the appropriate wide angle, over 23° in C4 FUEGO VGR.On the opposite, traditional footpockets and/or blades with narrower angles, force fins away from the body axis. The diver will be compelled to arch his/her back when swimming (by necessity a symmetrical movement) for moving in a straight line.Arching the back increases the diver frontal section and increases the hydrodynamic resistance. Both the arching and the increase of the resistance subtract energy, detrimental on both dive time and safety.When the angle between the diver axis and the fins axis is too wide its possible to have damages to articulations as knees and ankles. Its plainly impossible with C4 FUEGO VGR; the ergonomics is at its maximum.C4 FUEGO VGR fin is produced taking in account hydrodynamics requirements both because it has thoroughly rayed shapes and a close outline in its shoe, and because it lacks side stiffeners. Without side stiffeners it has been possible to distinctly reduce the shoe frontal section, in the same way reducing related hydrodynamic resistances.Right and Left anatomic shoe.How well a fin fits is an essential feature to the effectiveness of it. The shoe, not anymore simply footpocket, is the primary component in the cinematic chain of energy transmission from the foot to the blade: better the connection, more energy will be transferred to the movement. A freediving fin has an optimal performance if the shoe has good ergonomics, if it fits perfectly to the foot. For this reason we produced anatomic right and left shoes, with a customable regulation of the shoe lacing.A single footpocket, somewhat constricting the foot or letting it free to partially move inside it, has been so far the usual conditions every diver had to deal with, choosing between how much pain to endure or how much energy to disperse.C4 FUEGO VGR simply eliminates at the origin all these problems: they significantly improve how well it fits, giving more comfort and effectiveness to the athletic motion. For obtaining the best ergonomics, C4 shoe has been shaped from the best running shoes, revised to fit freediving divers requirements.Optimal C4 shoe anatomy allowed the use of a strong polymer, so guaranteeing an excellent energy transmission without reducing comfort.The shoe has been planned with different thicknesses, obtaining different resilience in various portions and optimizing energy transmission.The choice to produce shoes without traditional side stiffeners moved the fins centre of gravity toward the foot, making them significantly lighter when swimming.Energy absorption due to side stiffeners in traditional fins has been measured in tests developed in the Engineering Department of Padua University, and it resulted to be of 55% in the hysteresis loop. In C4 FUEGO VGR this energy is not squandered in the shoe, with an obvious benefit in performance.Its easy for all to appreciate the superior comfort due to the anatomic right and left shoe compared to the traditional fin with an identical footpocket for both feet.Shoelacing adjustment.Its easy to obtain a fine custom adjustment of the shoelacing, using the elastic strings C4 FUEGO VGR are provided with. This gives the best possible fit for every foot. Its a system very similar to the one were used to with land shoes: right and left shoes, with laces to tie them up.For the foot, underwater or on land, comfort and energy transmission are exactly the same. Having the possibility to custom adjust the attachment pressure is the maximum a freediver could ask to his/her fins!The lace operates on five points and the adjustment has to be done only once, on land. When decided the attachment pressure and tied up the lace with a knot (see assembly instructions) the diver can forget about it and use C4 FUEGO VGR exactly like all other fins, putting them on and taking them off like its used to.Thanks to the possibility to loosen and tighten at will the shoes it will be possible, changing only the laces, to use thicker or thinner socks, adapting C4 FUEGO VGR to the vagaries of temperature seasons.This system of adjustment, with an elastic lace, has been selected after testing countless solutions. Zips, buckles, numerous kinds of fastenings, Velcro: no one of those, for a multiplicity of reasons, offered better results than elastic lace.Its a solution simple, practical, easy to cope with even if therere problems in a far away island, its enough a piece of rope. Its not metal and it will not rust, its not a device and itll not get stuck, it has not springs, itll not open by accident, it does not carve the shoe polymer, its very light, it spreads out the pressure onto five points, allows an elastic distribution of effort, its truly reliable, its an extremely marine solution and its really inexpensive, a good thing above all this. If the lace breaks up when diving the breaking point will be forcedly in a stretch of it. The friction the remaining portion of it still exerts on other insertion points will prevent the sudden unfastening of the attachment: the diver can so continue to swim in great safety.C4 carbon blades are composed by many layers of fibers and have a progressive lamination for obtaining the required parabolic bending curve. Being bended, external layers are submitted to biggest strains. Therefore the whole blade resilience to the start of breaking greatly depends on the external layer resilience and the blade section involved.C4 FUEGO VGR blades have section resilient to breaking increased by 15%. Moreover the position of fastening screws has been appositely moved away from the blade bend so to cancel the effect of the holes drilled in it.The combination of increasing the resilient section, of non drilling holes in the section under strain and of altering the blade lamination, allowed, in lab tests, the reaching of fracture resilience better than 40% compared to C4 Falcon blade, already so many times put to test.The excellent sports results obtained with C4 blades are a sure guarantee of performances by our products and suitability of our technical choices.C4 FUEGO VGR blade prolong till the heel so to assure maximum energy transmission. Blade measures are 800 x 190 mm. Traditional blades are not compatible with C4 shoes, first because the joint is different and second because theyre not resilient enough, having been planned to use with side stiffener footpockets.C4 FUEGO VGR are assembled with mounting screws, without any glue so to have the best portability.C4 shoes right and left, are provided in five sizes:European sizes: 39/40 – 41/42 – 43/44 – 45/46 47/48US/Canada sizes: 7-7 – 8-8 – 11 -12 – 13-13UK sizes: 6-7 – 7-8 – 8-10 – 11-11 – 12-13C4 FUEGO VGR 25 soft 800 x 190 mmC4 FUEGO VGR 30 medium 800 x 190 mmC4 FUEGO VGR 40 hard 800 x 190 mmAll the C4 products are made 100% with carbon tissue MEGAFORCE T700

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Mares Spring Straps

Mares Spring Straps
Mares – Mares Spring Straps

Mares Spring Straps. STAINLESS STEEL SPRING STRAPThe ideal strap for your fins Special buckles in stainless steel Comfortable rubber shape Available in 3 sizesPair of ABS buckles to easily close and adjust the strap. Can be mounted on any Mares open foot pocket fin.code: 415305Steel Spring StrapsThe number 1 in fin technology knows what divers need! Now Mares offers high-end fin straps with the tab principle designed especially for Mares fins. The right mix of materials and fins together are the cherry on the cake! With the new Steel Spring Straps for open pocket fins, Mares not only expands its line, but also brings it up a level: the length and elasticity of the stainless steel tabs were conceived based on the requirements of Mares footpockets, ensuring perfect placement of the foot and optimal transmission of power to the fin blade.For this reason, the new spring straps had be created in three different sizes (depending on the sizes of the fins). For comfort even during long dives, a soft but sturdy and long-lasting rubber was used, with plenty of support for the heel. The bothersome marks that classic heel straps often left behind are now a thing of the past.The large and easy-to-use eyes serve as traction elements that make it easy to open or close the strap without effort, even wearing thick neoprene gloves.Even the steel buckles have been adapted for use with Mares fins, so the Spring Straps can be mounted easily on all Mares fins without problem, ensuring a safe connection. Steel Spring StrapsType Supple steel straps with tab for open foot pocket finsLength 32 cmMaterial rubber-coated steel with tab (traction element)Weight 350 gColor blackSizes S, R, XL

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