Overload Fitness Slam Balls are designed to withstand a beating and are the perfect counterpart for training strength, power and conditioning. Built with extra thick rubber, you can slam and throw these balls to your heart’s content. They also feature tyre tread grip which offers greater traction for easy gripping. The thicker rubber grip also prolongs the life of the Slam Ball making it less susceptible to wear and tear. Due to their tough design, they are suitable for both use in and out doors and can be thrown into concrete, grass, rubber mats or sand. Thanks to the “dead” weight design of slam balls, they will not roll once thrown making them a great tool for fast paced, full body workouts.