Available as a 4 pack set, the Composite Wall Balls are made to be thrown against the wall, targets multiple joints and muscle groups simultaneously. Made of durable, high-quality Poly-Composite Laminate and PP cotton material, the soft-shell Wall Ball features tight, thick double stitching that keeps the ball closed and the material from escaping. The exercise ball's large, ergonomic build makes it easy to toss straight up, pass to a workout partner, or use the wall ball for standard medicine ball exercise routines. This Composite Ball is not for slam ball exercises. Smooth, grippable, and functional, throw the ball against the wall to work out multiple muscle groups and joints, which helps you in everyday life and movements.