8-Inch high air cells are constructed with Nylon/50% PVC for durability. CPR valves provide fast (20-Second) deflation. Easy to replace individual bladders. LED and audible alarm provide critical performance data and alert caregiver when pressure falls below 10mmHg (inner mattress pressure) . Mattress can operate in an alternating or static pressure mode. Mattress has 20 air bladders, nine (9) with laser holes to achieve low air loss function, to increase patient comfort, keep the patient cool and speed recovery.