Champion Sports Rhino Promax Slam Balls, Soft Shell with Non-Slip Grip – Medicine Wall Ball for Slamming, Bouncing… Featured! $61.15 Make sure this fitsby entering your model number. MIX UP YOUR ROUTINE: The Rhino Promax slamball offers a fun and unique way to get an effective workout without using traditional gym equipment; Incorporate our jumbo slam balls into your workout to improve speed, agility, cardio and core strength SMOOTH, SUPERIOR GRIP: Brandishing our proprietary Rhino Skin leather shell, users experience a comfortable yet controlled, non slip grip; The exercise ball’s large, ergonomic build makes it easy to throw, catch, and slam even when sweaty