The Aqua Sphere Zip Fin eliminates ankle fatigue for an efficient workout
Easy-adjust buckle system
The most comfortable and efficient fitness fin on the market
Aqua Sphere ZIP FIN Patented Nature's Wing® fin technology is the only fin that eliminates ankle fatigue for fitness swimmers, allowing for a full-leg workout that can be sustained over longer periods of time for maximum and efficient aerobic benefit. The unique blade features specially engineered side rails, strategically aligned flex channels, and hydrodynamic stiffening battons that combine to make the Zip Fin the most comfortable and efficient fitness fin on the market.
The split blades, which act like propellers, twist independently during each stroke to a precise angle of attack that creates lift and thrust. The Zip Fin features an open heel adjustable ankle strap.
Eliminates ankle fatigue for an efficient workout
Easy-adjust buckle system
Comfortable foot pocket with Soft neoprene ankle strap
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