Weightless "weights" for a superior underwater workout. Get the arm-toning strength-building benefits of a free-weight workout without lifting a pound. DeltaBells offer all the resistance you need. Push, pull or turn DeltaBells underwater. The unique triangular shape lets you choose the workout level with the turn of a wrist. DeltaBells are constructed of buoyant foam with a comfortable padded grip; use them for added balance and support during abdominal or leg workouts too! Handbook is included.