Circle One Bodyboard Fins, Ergonomically designed with offset blades. Soft foot pockets, Stiff blade for power & drive, Quick acceleration in take-offs, Stiff ridge blade for power and max thrust, An economical, high spec, comfortable fins for body boarding. Unlike some high performance pro fins, the rubber compound is soft to give a more confortable foot pocket . They are designed to flex a little preventing cramps or tired legs.