18.1inch Balance Half Ball Trainer With Resistance Bands & Foot For Exercises Our balance ball is made with slip-resistant material that allows you to safely exercise with the ball worry-free•Upgraded textured surface allows for a stronger grip, so you can avoid injuries and accidents while trying to improve your coordination and agility• The combo gives more opportunities to target more muscle groups and thus strengthen your core and muscles•Also helps improve balance; All in all, with this half-balance ball workouts,you'll get the body u deserve• u can unlock your body potential and get more fun workout experience• The trainer dome side up provides an ever-changing, unstable, dynamic surface• The Gym Balance Ball with Resistance Strap and Pump gives you the crucial benefits that come with better balance.•can safely stand, jump, or kneel