The Geo-Matrixâ„¢ overlay is constructed of 1â€³ gel, in a 36â€³ W x 80â€³ L configuration. The overlay is designed for use over an existing foam mattress. The overlay is indicated for prevention/maintenance of skin health and the treatment of early stage, non-complex pressure ulcers. Each overlay comes with a four-way stretch, fluid proof, fire retardant (Cal. Bulletin 117) anti-microbial cover.