Looking for a workout that will really get your heart pumping? Then you need a Morgan slam ball! Slam balls are designed for exercises that require you to drop, throw, or slam the ball – making them perfect for an intense workout. What makes Morgan slam balls different from regular medicine balls? The slam balls are made with a heavy-duty rubber shell that is filled with fine sand. This design allows the ball to move smoothly and effortlessly, even when wet. The rough (tyre tread) surface provides a great grip, while the sunken air valve allows you to adjust the air capacity and firmness of the ball.