Bubble style pad effectively reduces pressure. Automatic 5-minute cycle alternately inflates and deflates. Heavy gauge, medical grade vinyl is easy to clean, flame retardant and anti-bacterial. Pump mounts to bed with built-in mounting bracket and features an illuminated on/off switch. Mattress Dimensions: 78"; x 34"; x 2 ½"; 275 lb maximum weight capacity. Manufacturers 90-day limited warranty on pad, 1 year warranty on pump. Latex Free.