Morgan slam balls are designed for workouts that require a ball to be dropped, thrown, and/or slammed and are different from regular medicine balls. It is popular among fitness enthusiasts with over 10,000 Morgan slam balls sold per year. Our slam balls are constructed with an ultra-durable and heavy-duty rubber shell filled with fine sand for fluid movement. A rough (tyre tread) surface allows for a high-quality grip even when wet. Each Morgan slam ball comes with a sunken air valve to adjust air capacity and overall firmness. It also acts as a safety feature to soften the blow.