Provides anterior build-up at midline to prevent forward ischial migration. Revolutionary Moleculon foam provides increased comfort and decreases the probability of pressure sores. Non-contoured seating surface allows for easy transfers. Waterfall front, coccyx cutout and large radius bottom provides versatile surface for sling or flat seated wheelchairs. Soft easy to clean removable Solace cover is fluid-proof and provides multi-directional stretch and helps protect against shear force. The QuadraGel pack has four compartments to provide optimal distribution of body weight. The pommel provides comfort and leg abduction. Front 3H x Rear 2H. Abductor is 5.5H for 16 wide cushion and 6H for 18 and 20 wide cushions.