Gymnic Heavymed 4 Medicine Ball, Magenta (20 cm, 4 kg / 8.8 lbs) Incorporating medicine ball training into your workout can target particular muscle groups to help build power and condition the elasticity of the tendons/muscles Multi-functional piece of equipment that can be used for both fitness activities as well as physical therapy practices Allows for a wide range of exercises to help improve upper/lower/core strength, balance, coordination, flexibility and joint integrity Phthalate and BPA free; Made from durable, latex-free, and comes in a variety of colors and weights Each medicine ball is water filled and comes with a bonus fitness guide to enhance your personal workouts