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. The fin blade is made of top-quality polyurethane material that provides a quicker response to movement over rubber and plastic fins.TUSA's unique "Vortex Generator" effectively reduces water resistance through the fin stroke normally found on traditional smooth blades. Six (6) performance ridges positioned behind the blade vent reduce resistance, creating a smoother and more efficient kick cycle. Performance enhancing "Comfort Foot Pocket" multi-compound foot pocket increases power transfer to the fin blade. The angled blade design (A.B.D.) accommodates for this anatomical characteristic and ensures maximum efficiency throughout the kicking cycle. Standard with universal bungee heavy-duty elastic fin strap provides easy donning and doffing of fins. The quick adjustment accommodates five (5) adjustable positions. TUSA Hyflex System for a compact and lightweight travel package and is available in multiple sizes. Fin measures (L x W) 23.5 x 8.0" (597 x 204mm) and weighs 4.2 lbs (1,895g) in size medium.