The SelfAir mattress is made of highly elastic foam and can entirely replace a common mattress. The lower foam layer provides good stability, while the upper foam layer reduces the counteracting force of the body and adds comfort. The mattress core incorporates four air cells that are interconnected with a pneumatic hose. While the air flows from one air cell to another, the flow control valves adjust the flow to the weight, position and shape of the individual patient. The superfluous air escapes out of the air cells, thereby reducing the pressure in the air cells. The contact surface between the body and the mattress thus enlarges and the pressure on the body is redistributed. When the patient gets out of the bed, the foam straightens and the flow control valves enable the air to flow back into the mattress to adapt the air cell pressure to the ambient air pressure. A specifically designed sloped section in the knee zone reduces pressure in the sensitive heel area. The SelfAir dynamic air mattress offers an excellent distribution of the patient’s weight over the entire surface and is renowned for its good anti-decubitus properties. It is suitable for patients diagnosed with mild to moderate risk of chronic pressure ulcer development.