Easy-Rest 12-Inch Luxury Gel-Rest Memory Foam Mattress, California King X-Large Luxury 5 lb. memory foam, cool open cell memory foam Open Cell Cooling Polyurethane foam 100% Polyester cover CertipurUS certification (sleep tight knowing your childs mattress is certified by leading quality and safety standards certified to have nothing harmful in the mattress) Luxury Italian open cell memory foam that is pressure sensitive Waterproof, Washable, anti-microbial, anti-dust mite, polyester cover Non Skid bottom to make sure the mattress stays in place No motion transfer (makes it hard to jump on)