The Aquafins Aquatic Exercise Kit lets you engage in whole-body conditioning through low-impact water exercise that will tone and shape your body in a gentle and sustainable way. The AquaFins kit includes two one-size-fits-all cuffs that secure the Predator fins to either your wrists or ankles so both your upper and lower body will look great. Made from soft yet durable Santoprene®, these aquatic therapy tools are comfortable and won't irritate the your skin as you workout.