The TUSA HyFlex SWITCH Pro offers a 20% stiffer blade compound for the advanced diver. The PuRiMaX "Polyurethane Blade System" generates great forward propulsion and 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. 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 Technology Powered by PuRiMaXThe fin blade is made of top quality Polyurethane material that provides a quicker response to movement over rubber and plastic fins. Vortex GeneratorSix (6) performance ridges positioned behind the blade vent reduce resistance, creating a smoother and more efficient kick cycle. Angled Blade Design (A.B.D.)The Angled Blade Design accommodates for this anatomical characteristic and ensures maximum efficiency throughout the kicking cycle. Bungee StrapThe heavy-duty elastic fin strap provides easy donning and doffing of fins. The quick adjustment accommodates five (5) adjustable positions.