Abstract: A patient support includes a layer of fluid pressurized bladders, the bladders each having a chamber and an upwardly facing surface for facing and supporting a patient, and a cover over the layer of fluid pressurized bladders. Respective bladders in at least a group of the bladders each have a resilient body in its respective chamber to reform the shape of the respective bladder when a compression load on the respective bladder is removed wherein the pressure in the respective bladders is generally maintained without a powered supply of air. The cover has an upwardly facing patient surface and a bladder layer facing surface, with the patient surface for forming a patient support surface on the support, and the bladder layer facing surface for lying on the upwardly facing surfaces of the bladders.

Abstract: A patient support includes a cover and a compressible layer that includes air flow passages extending laterally, longitudinally, and transversely through the layer. The cover envelopes the compressible layer and forms a patient support surface thereon and further is adapted to be liquid impermeable, yet allow moisture vapor flow through the cover into the compressible layer and also allow moisture vapor flow out of the cover at a location other than the interface between a patient's body and patient support surface so that together the cover and the compressible layer will transport away moisture from the patient's body at the interface at the patient support surface and direct the moisture vapor to the location other than the interface at the patient support surface.

Abstract: A patient support includes a layer of fluid pressurized bladders, the bladders each having a chamber and an upwardly facing surface for facing and supporting a patient, and a cover over the layer of fluid pressurized bladders. Respective bladders in at least a group of the bladders each have a resilient body in its respective chamber to reform the shape of the respective bladder when a compression load on the respective bladder is removed wherein the pressure in the respective bladders is generally maintained without a powered supply of air. The cover has an upwardly facing patient surface and a bladder layer facing surface, with the patient surface for forming a patient support surface on the support, and the bladder layer facing surface for lying on the upwardly facing surfaces of the bladders.