PVC-Free Balance Disc - Massage SurfaceHigh quality air cushion made from non toxic materials. The larger diameter and height allows for a huge variety of exercises as both hands and feet can be comfortably placed on the cushion. Heavy duty feel with circular ribbing on one side and a light pimple grip on the other. The cushion can be used as a balance cushion to improve your sense of equilibrium, coordination, reaction and motor skills, it is also ideal for muscle exercise and toning. Can