The unique, one-size-fits-all cuffs and Predator Fins are made of soft Santoprene rubber for strength and flexibility, and can be worn comfortably on the wrists or ankles for full body conditioning. Using the Aquafins: The force produced by the Aquafins is dependent on several variables. The amount of drag determines the force. The more surface area of the fins in contact with the water, the more resistance. Therefore, changing the orientation of the fins will change the drag. Faster motions underwater also produce more force. Each kit contains: 2 cuffs, 4 Predator Fins, detailed instructions for toning and strengthening legs and lower back, inner and outer thighs, arms, chest and upper back and comes in a mesh carrying case.
