A patient support 10 comprising: a cover 19; and a compressible layer, the compressible layer comprising a gel layer 18,118 formed from a plurality of gel bodies 44,144, the gel bodies 44,144 optionally comprising hollow gel bodies, the gel layer 18,118 having a lower surface and an upper surface, each respective gel body of the gel bodies 44,144 being compressible along its respective central vertical axis from an uncompressed state to a compressed state when a load is applied to the respective gel body, the respective gel body reforming to its uncompressed state when the load is removed, each gel body having a gel sidewall 48,148, the gel sidewall 48,148 of each gel body being connected to at least one adjacent gel body by a gel web 46,146, the gel webs 46,146 and the gel sidewalls defining chambers 54 therebetween bounded between a lower plane extending through the lower surface of the gel layer and an upper plane extending through the upper surface of the gel layer, at least some of the gel webs 46,146 forming transverse passages there through to allow fluid to flow between their respective adjacent chambers 54 wherein the compressible layer has air flow passages extending laterally, longitudinally, and transversely through the layer, the cover 19 enveloping the compressible layer and providing a patient support surface thereon for a patient, the cover 19 being adapted to allow moisture vapor flow through the cover 19 into the compressible layer at an interface between a patient and the patient support surface and also allow moisture vapor flow out of the cover 19 at a location other than the interface so that together the cover 19 and the compressible layer will wick away moisture from the patient's body at the patient support surface and direct the moisture to the location other than the patient support surface. a cover 19; and a compressible layer, the compressible layer comprising a gel layer 18,118 formed from a plurality of gel bodies 44,144, the gel bodies 44,144 optionally comprising hollow gel bodies, the gel layer 18,118 having a lower surface and an upper surface, each respective gel body of the gel bodies 44,144 being compressible along its respective central vertical axis from an uncompressed state to a compressed state when a load is applied to the respective gel body, the respective gel body reforming to its uncompressed state when the load is removed, each gel body having a gel sidewall 48,148, the gel sidewall 48,148 of each gel body being connected to at least one adjacent gel body by a gel web 46,146, the gel webs 46,146 and the gel sidewalls defining chambers 54 therebetween bounded between a lower plane extending through the lower surface of the gel layer and an upper plane extending through the upper surface of the gel layer, at least some of the gel webs 46,146 forming transverse passages there through to allow fluid to flow between their respective adjacent chambers 54 wherein the compressible layer has air flow passages extending laterally, longitudinally, and transversely through the layer, the cover 19 enveloping the compressible layer and providing a patient support surface thereon for a patient, the cover 19 being adapted to allow moisture vapor flow through the cover 19 into the compressible layer at an interface between a patient and the patient support surface and also allow moisture vapor flow out of the cover 19 at a location other than the interface so that together the cover 19 and the compressible layer will wick away moisture from the patient's body at the patient support surface and direct the moisture to the location other than the patient support surface.