The TUSA SF0104 HyFlex Switch fins were named  Scuba Lab's Testers Choice in Scuba Diving's May 2017 issue. Watch the Scuba Lab Testers Choice review video here:
 
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.