The Professional provides exceptional pressure relief for users at risk of skin breakdown or with a history of pressure ulcers. A full 1 5/8" thickness of AKTON polymer provides effective weight distribution on a contoured or flat surface. The Professional provides an additional 50% cushioning against pressure, shear and vibration. This is significant for those active clients using a power wheelchair who have concerns about bottoming-out and the potential effects of increased temperatures (due to foam insulation properties). Comes with Basic Cover . Incontinent and replacement covers are also available.