The TUSA SF0104 HyFlex SWITCH is powered by PuRiMaX “Polyurethane Blade System”. The Polyurethane blade provides a quick “snappy” response to the diver’s every movement. TUSA’s unique “Vortex Generator” effectively reduces water resistance through the fin stroke normally found on traditional smooth blades. TUSA’s Multi-compound foot pocket increases power transfer to the fin blade. The TUSA HyFlex Switch is equipped with the new Universal Bungee Strap providing extraordinary comfort.