Textured Grip - A robust tire tread surface gives you a sturdy grip during intense workouts to prevent the heavy gym ball from slipping through your hands. Durable- A supple rubber shell absorbs impact and holds up through the toughest workouts so you can slam your way to a more fit body. No Bouncing -Dead weight design is perfect for forceful slams without the heavy medicine ball bouncing back or rolling for better control and safety. Multipurpose - Gym slam balls are ideal for strength training, Weight training, and improving coordination.