Mattresses and cushions , methods of making mattresses and cushions , and patient supports comprising a mattress and/or a cushion. At least some embodiments of the present mattresses and cushions comprise a body with air- impermeable material having a plurality of openings , and a cover sheet comprising air -permeable and liquid -impermeable material covering at least a portion of the plurality of openings and coupled to the body by a liquid- impermeable welded seam encircling the covered one or more openings.
