Prevents and assists in the healing of ischemic ulcers and tissue breakdown. The first weighs only 3 1/2 lbs. and allows maximum performance for those unable to independently shift weight. The second maximizes stability and prevents risk of potential tissue breakdown. It weighs only 2 3/4 lbs. and is for those who can independently shift weight and transfer. Durable, fluid-resistant Neoprene rubber cleans easily; can be steam autoclaved. Includes washable cover, pump, operating instructions, and repair kit. Latex free.