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.
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.