This is the Tusa Hyflex Switch Scuba Diving Fin Disassembles for Travel Features: Powered by PuRiMaX Polyurethane Blade System" Vortex Generator Performance enhancing "Comfort Foot Pocket" Multi-compound foot pocket increases power transfer to the fin blade Standard with Universal Bungee Strap (TA0902) Angled Blade Design TUSA Hyflex System for a compact and lightweight travel package The TUSA Hyflex Switch is powered by PuRiMaX Polyurethane Blade System. The polyurethane blade provides a quick snappy response to the diver&';s every movement. Six performance ridges positioned behind the blade vent reduce resistance, creating a smoother and more efficient kick cycle. 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. "