The ultimate in water resistance training, the Aquafins aquatic exercise kit includes one-size-fits-most cuffs with training fins made from hard rubber for strength training. Aquafins can be worn comfortable on the wrists or ankles for full body conditioning. Each kit contains two cuffs and four fins in a mesh carrying bag and detailed intructions for toning and strengthening legs and lower back, inner and outer thighs, arms, chest and upper back.