Gel memory foam creates a cool sleep experience as it conforms to relieve pressure points. Dual-layer technology - 1" soft, ventilated cooling layer with 4" supportive base foam layer.CertiPUR-US certified (no harmful odors), resistant to dust mites and safe for children - Twin XL Size: 38" x 79". The item "LUCID 5 Inch Gel Memory Foam Mattress Dual-Layered CertiPUR-US Certified" is in sale since Friday, September 15, 2017. This item is in the category "Home & Garden\Furniture\Beds & Mattresses\Mattresses". The seller is "sellsim_2day_shipping" and is located in Miami, Florida. This item can be shipped to United States.