Air Ring - Inflatable Round Cushion | Flexi-AidNew multi chamber design Effective weight distribution Ideal For People Who Sit For Long periods, whether at home or office, car, wheelchair, or outdoors. It helps to improve blood circulation and muscular relaxation. Inflatable Interlayer is designed to raise compressive strength Easy to store and carry The hollow helps to prevent chafing, and the newly designed seal chamber improves the strength of the cushion. USAGE Inflation: Pull up the valve.