Pressure Relief Mattress Covers by Drive Medical is the ultimate in pressure prevention multi-layered mattress covers. When a patient is prone to exiting the bed unassisted or to falling out of the bed, Drive Medical's defined perimeter cover is a great solution. When installed on a standard bed, the soft foam bolster cushions surround the edge of the bed to promote a safe bed environment, without the need for confining side rails. Free Shipping on all products