The DynaRest Alternating Pressure Pump and Pad provides alternating pressure and is designed to be used in the treatment and management of pressure wounds. The bubble pad is constructed of a durable heavy vinyl with 130 individual cells that are alternately inflated and deflated with the consistent air flow and pressure provided by the pump. This alternating Pressure Pad can fit over an existing mattress or bed, using end flaps to hold the overlay securely in place.