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The Aqua Sphere Zip Fin 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. They are also ideal to complement your swim drill sessions as they provide a little extra propulsion so you can completely concentrate on your drill technique.

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.

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