12-inch Gel Memory Foam Triple-Layer Plush Mattress by Abripedic WITH 25-year Warranty! (Twin XL : 38x80x12") Gel formula memory foam is infused with gel beads to capture and distribute heat. Open Cell technology allows air flow, keep the mattress cool and comfortable 2 inches of 4lb Gel Infused memory foam layer, 2 inches of 4lb memory foam comfort layer and 8 inches of polyurethane foam. Designed to give the unique comfort and support properties of memory foam Antimicrobial and resistant and resistant to allergens, mold, bacteria and dust mites. 100% CertiPUR-US Certified -- this means our product has been independently tested for safety of materials used, physical performance, and healthy sleeping environment. We ship UPS ground to the lower 48 states. Street address required for UPS shipment. NOTE: This item cannot be shipped to AK/HI/PR/APO/FPO/PO BOX.