The medicine ball is one of the most dynamic training tools. This IBF Iron Body Fitness deluxe medicine ball set allows you to improve your overall strength, cardio, flexibility, agility, and stamina with your workout. The rubberized weighted balls feature a heavy-duty dimpled textured surface that provides superior grip and durability. They are designed to bounce, and this provides for a more versatile workout, enabling a variety of individual and partnered exercises, such as weighted crunches, lunges, and sit-up passes among countless other options. This set includes an 8 lb. ball and a 15 lb. ball, so you can incrementally increase the challenge of your workouts.