Half Balance Trainer Ball with Resistance Bands for Strength & CoreHalf Balance Trainer Ball with Resistance Bands for Strength & Core This half balance trainer is a solid piece of gear for everyday workouts. Its made with sturdy PVC and designed to handle tough sessions. You can do a lot with itplanks, squats, push ups, and more. The textured surface helps you stay in place without slipping. It comes with resistance bands so you can add more to your routine. Setup is fast with the included pump, and its just as easy