This special air-filled balance wedge is great for prolonged sitting, as well as exercising. Pebbled on top and smooth on the bottom, the AeroMat Balance Wedge eases back pain and reduces fatigue, so you're more comfortable sitting for periods of long time. The angled design promotes balance and muscle strength when incorporated into standing or sitting exercises, resulting in positive improvements in posture. This inflatable balance disc cushion helps shape and tone your lower body, while improving balance and flexibility. The textured massage foot surface improves grip.