Treats up to Stage IV pressure ulcer. Cell-on-cell design prevents bottoming out. 24 hours of use if power is lost. Custom setting w/advanced digital pump, & auto returns to alternating pressure mode if left on static mode. 4 Cover is 4way stretch, low sheer, fluid resistant, vapor permeable, quilted & zippered. Pillow function lets cells at head of bed to stay static. 3 diagnostic alarms for problems. Quiet pump produces 15LpM air flow.   #14029DP-80x36x8 w/Perimeter  #14029-84-84x36x8 Latex Free UNSPSC42191810