Exercise Ball Slam Ball MASTER - an ideal tool for training strength, endurance, speed, and coordination. It is a heavy ball with a moving filling and a non-slip surface that ensures an easy grip and helps maintain a secure hold. Its versatility is a significant advantage; it can be used in exercises that cannot be covered by traditional gym equipment such as dumbbells or weight machines. Similar to medicine balls, the slam ball is designed for flexible throws without bouncing. For this reason, it is a very popular addition to CrossFit.