SMAI Commercial Medicine Balls are manufactured with key features to withstand the abuse you will throw at them. They are created with a strong rubber shell for durability but also feature a dimpled design on the outer shell to ensure the ball is slip resistant. Available in differing weight sizes. Used within CrossFit workouts, these medicine balls are a great addition to any workout. Product note: warranty does not cover the use of medicine balls when used as a slam ball. Meaning the balls are