The variable-thickness blade bends during the various phases of fining action, achieving an ideal flexion curve; this is due in part to the use of the best techno-polymers, the true core of agility and elasticity. The special design of the channels on the blade and the lateral stringers on the foot pocket make it possible to channel and increase the flow of water toward the pronounced V" at the tip, increasing thrust and preventing the fin from slipping laterally. Its light weight and power give the Razor Pro the best yield among all the techno-polymer fins currently available on the market. Need hardware or foot pocket? See SKU's: MRSFPR and MRSFRFS Fin Foot Pocket and Mares Blade Fixing Set for Razor Fin.