8 deep * The Alternating Air Flotation Mattress System with gentle low air loss incorporates the features that clinicians demand for their patients in a portable system * Mattress utilizes 18 independent 5.5 deep air cells to reduce interface pressure for the prevention and treatment of Stages I-IV pressure sore ulcers * User friendly controls and ease of setup make Rapid-Air Plus ideal for institutional use and the homebound patient * Designed to fit all standard hospital beds * CPR valve for quick deflation * Vyvex nylon mattress cover wicks moisture away from patients skin and is low shear anti-microbial fluid resistant fire retardant and washable as well as loose fitting to conform to the patient * Cover is removable zippered