TUSA SF0104 HyFlex SWITCH FinsTUSA 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