The Protekt Aire 4000 by Proactive Medical is the first choice of clinicians for an economical, yet high-quality alternating pressure and low air loss therapy mattress system. Its powerful and effective pump flows through 18 laser holes on the surface of the mattress and pumps 8 liters of air every minute to keep the user cool, dry, and comfortable. This mattress aids in the treatment and prevention of pressure ulcers and is a great choice for users with pressure ulcers ranging from stages 1-4.