A 20 cm high CombiAir dynamic mattress can entirely replace a common mattress. The air cell pressure is automatically adjusted and does not exceed the medium capillary pressure of 25 mmHg. The dynamic CombiAir 18/2 is composed of 18 transversal inflatable air cells, which inflate and deflate in alternating intervals. The dynamic treatment therapy is alternating in every 2nd air cell. A firm longitudinal foam layer provides better support to the patient sitting at the edge of the bed. The inflatable air cells are covered with a 3 cm thick and extremely soft viscoelastic foam for added comfort. The CPR valve is accessible from the side and allows a rapid deflation of air cells in a resuscitation event. Each air cell is separately attached to the basis, which simplifies its replacement. The mattress incorporates a 5cm thick foam layer. The mattress cover is made of high-quality elastic incontinence-proof material, which prevents fluid penetration; however, the material is breathable and permeable to moisture. The mattress is suitable for patients with body weight from 50 to 200 kg.