The Easy Air 500 Lexus Mattress Overlay system features alternating 5" cells for mid to long term patients. With 17 interchangable cells, and also with low air loss and fillow function allowing flexibility for each individual patient needs. Air filter is located on the outside surface for easy cleaning. A removable multi-stretch vapour-permeable nylon cover. Alarm and light warning if sytem is not operating. Ultra light weight pump is the new profile design, amazingly compact and efficient.