20 inches by 16 inches by 3 inches Designed to off load tissue under the coccyx thereby eliminating pressure under the coccyx Firm CORE Foundation: High density beveled polyethylene provides a firm foundation that eliminates hammocking. Dual density foam layers provides a soft top entry layer promoting direct interface with cooling gel-pod and a higher density base layer for support and pressure distribution. This top-design brings the gel-pod up close so you can feel the superior comfort and stability. High performance pressure reducing fabric promotes healing via active evaporation of moisture and cooling at patient pressure points. Antimicrobial, water-resistant and mildew-resistant. Aqueous Dual Gel-Pod: Dual chamber gel-pod reduces gel migration. Slip resistant bottom with easy to attach quick-release straps keep cushion in place Meets CA 117-2013 standards Package/UOM: Each (EA); manufacturer item 9599-GC-201603.