Alternating pressure air mattress from Dmv. Designed for the prevention and treatment of pressure ulcers through variable alternating pressure in 18 air chambers. Made of durable PVC, in a single size with case. Dimensions for beds: 900 x 2000 x 120 mm. Maximum user weight: 160 kg. Includes electric air pump. Warnings: store away from high heat and direct sunlight, regularly check the pump and pressure mechanism, avoid contact with sharp objects.