Sunlite Sports High-Density EVA-Foam Dumbbell Set, Water Weight, Soft Padded, Water Aerobics, Aqua Therapy, Pool Fitness, Water Exercise (Aqua Fitness Complete Set With Instructional Videos)Exercising in the water gives your body less impact than traditional land exercise. The water helps alleviate stress and pressure on your joints, preventing injuries. Use this combo set in a variety of settings: Aquatic classes, water physical therapy, pool exercise, underwater fitness, water Zumba, water aerobics, and rehabilitation. The water weights are constructed of high density EVA foam that provides greater resistance and better workout