By allowing for fast, dynamic exercises like slams, passes, swings and throws in a wide range of motions, Slam Balls create the explosive power and functional strength that traditional gym equipment cannot. They're also great for adding resistance to body weight workouts and intensifying repetitive movements to simultaneously build muscles and increase aerobic capacity not to mention a fun way to release stress. DESIGN: Improve functional strength, stability and balance Increase explosive power with dynamic exercises Add challenging variations to bodyweight workouts Flexible plastic exterior withstands impacts Textured surface is easy to grip