This easy to use cushion is made of polyurethane gel, which has lower heat conductivity and helps keep the pad at a mild temperature. Available with a single or a dual airbag to give additional protection to the ischemic area. The air circulates between the cells in the airbags, reducing pressure concentrations around bony prominences and providing relief and comfort to the medium risk user. The gel only cushion offers basic pressure relief and shear reduction for people at low risk of developing pressure ulcers. Cushion size 425 x 425mm (163/4 x 163/4").