Aqua Sphere Zip VX FinsThe Aqua Sphere Zip VX Fins are designed to let you get more out of your swimming sessions, than normal. Some of its many benefits include increased cardiovascular conditioning and ankle flexibility. It also helps build greater strength in the legs and increases caloric burn, with the use of larger leg muscles. The fins leverages your natural kicking motion to produce a springboard effect and considerably increase swimming efficiency, keep the body in the right position and better your thrust. It has buckles that are easy to adjust, giving you just the right fit. The pads on the fin rails are non-slip, giving you traction for an improved push-off from the wall. The hole in the blade creates vortices, which in turn create a better thrust. The narrow blade gives you improved kicking mechanics, which lessens the stain and fatigue on your legs. The Aqua Sphere Zip VX Fins are perfect to use in swim training, and can be used by swimmers of all levels.