Features: 

• New design of larger tread offers an easy and tight grip on the exercise ball. Also, wide glossy groove allows water to slide through quickly, so no longer afraid of slips caused by sweat from sweaty hands and intense
• Sand filled with PVC shell, which allow the ball to absorb the energy of a slam instead of bouncing or rolling away
• The uniquely textured shell provides a non-slip grip for you to catch the ball easier
• Perfect for exercises like wall slams, overhead throw, Russian twists & squats. Great tool for Crossfit workouts, personal trainers, core strengthening, sport training like boxing, wrestling, & more