Spice up your ab crunches and lunges with this 15-pound medicine ball from Iron Body Fitness. The rubberized, weighted ball bounces so you can perform a variety of strength, core and flexibility exercises on your own or with a partner, like sit-up passes. The dimpled surface helps prevent the ball from constantly slipping through your fingers. | Iron Body Fitness 15-Pound Medicine Ball (92015-7) - Black/Grey