Our Lateral Turning Low Air Loss Pump & Mattress System ATM932 is the perfect mattress for supporting large patients. The Lateral Rotation Therapy reduces the risk of pulmonary complications for patients who are immobile. It helps control pressure, moisture, shear and friction, for prevention and treatment of stages I-IV Pressure sore ulcer. This mattress can be used as a replacement of a standard matrress. The top cover is machine washable, and the air controller unit provides hours of trouble free operations.