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 and comes in yellow and black, blue and black, and neon green and blue. Get a pair of Aqua Sphere's Zip Fins to complete your set of swim training triathlon gear.
Sizes:XS: child 11 - adult 2S: adult 3 - 6M: adult 6 1/2 - 9 1/2L: adult 10 - 13
