A medical air mattress for home use or hospital bed. Alternating pressure prevents bed sores and pressure ulcers. The compact alternating pressure pump is the secret for making this medical bed mattress comfortable. Durable, heavy gauge, premium vinyl with 130 individual bubble cells, from a leader in hospital bed mattresses. Sleep soundly in your own bed by installing this pressure sore mattress pad over your existing bed. Alternating pressure pump and pad system supports 300lbs.