For high risk patients, the cushion cells are split into two separate air chambers allowing the air pressure to be adjusted differently on each side of the cushion. Each of the cells that are contoured towards the rear. When pressure is applied, the air circulates to each of the cells, distributing weight evenly. The Trugel helps maintain body temperature, thus reducing the risk of shear and friction. Lightweight and easy to clean. Length 425mm (17"). Width 425mm (17"). Height 50mm (2"). Weight 2kg.