Disclosed are apparatus and methodology for reducing humidity (i.e. ,moisture) and/or heat within and/or adjacent a patient support mattress,withoutrequiring any electrical power A spacer fabric is used to create a non-crushablearea of support below a patients core area, where moisture and heat morecommonly buildup. Integrated air cells in the mattress have resilient elementssuch as open-celled foam interiors. The air cells are connected by air tubingto thespacer fabric, and the mattress is otherwise vented externally from the spacerfabric. As a result, the patients movement causes air to be expelled from ordrawninto the air cells, which in turn results in air movement in the spacer fabricbelow apatient or user, resulting in cooling effects by removing moisture and/orheat, allwithout requiring external or internal electrical power.
