Weighted ION Massage Ball Hula Hoop, For Effective Intense Abdominal Workouts and Quick Fat Burn - For Experienced Hoopers, Diameter 43in/ Big-ball Massage Hoop for Experienced User Maximizes weight loss and improves workout results. CAUTION *The hoop may be painful at first. But once you get used to it, it will help you get rid of those muffin tops by targeting your core muscles. * Burn Up to 500 calories or more per hour! Great for adults who want to lose and tone their abdominal area New ground-breaking fitness device that targets the core muscles while improving posture and circulation Wide hoop with 43 big size ION massage balls (diamter 40 inch) sufficiently provide massage to your body Simple assembly: connect the bodies and easy to take apart for quick storage; great for travel.