EATURES TUSA HYFLEX SYSTEM: The TUSA HyFlex system offers a variety of blades, foot pockets and fin straps to choose from. INNOVATIVE BLADE DESIGN: Featuring a wide, short, tech-style blade that delivers a burst of propulsion with every kick. ENHANCED WATER FLOW: Equipped with three strategically placed vent holes to facilitate water flow, minimizing resistance and maximizing propulsion. AQUADYNAMIC ACCELERATION: Includes one large and two smaller vent holes to improve water flow, enhancing aquadynamic acceleration. VORTEX GENERATOR TECHNOLOGY: Reduces drag and resistance, ensuring a smoother and more efficient swim.