Stryker Renaissance 1211 Replacement Stretcher Pad Institutional Grade Pressure Redistributing Pressure Mattress for Emergency Stretchers Option:Ultra Comfort 4" non sag base directly below the The splint is lightweight non sag base directly below the padding system to definitively prevent the occupant from bottoming out over years of deployment Velcro closures keep contents secure Fluid Proof Ingress Protection: Outfitted with an industrial grade North America Mattress Corporation warrants the original purchaser that its products should be free from defects in material and workmanship for a period of Twelve (12) months after the date of delivery