At 3 tall, this modification of the exclusive Geo-Matt design creates the lower, firmer base needed by many wheelchair users for safe transfers, easier propulsion, and better fit into the wheelchair/cushion system. Cut from a premium, high-density foam to allow equal support in a lower profile. Features the same individually responsive cells, Ring-of-Air heat/moisture reduction, and pressure reduction as original Geo-Matt. Available with Soft Skin sleeve or nylon and vinyl fabric cover for protection from incontinence. Cover accomodates optional Sling-Fill Base. Features Geo-Matt top layer Geo-Matt cut top layer reduces pressure, heat, and moisture. Foam Premium quality, high density foam is 3 thick to provide excellent cushioning in a height that promotes independent wheelchair propulsion. Sling-fill base optional Molded ABS plastic insert fills in the gap created by fabric slings. Creates a flat rigid foundation where needed. Fits into sleeve sewn into all covers on cushions with suffix. 1 Each / Each