Sleep Revolution MyGel 12 inch Memory Foam Mattress, King Sleep cool layering system-2.5 inch MyGel Memory Foam, 1 inch Memory Foam, 3 inch Pressure Relief Foam, and a 5.5 inch High Density Foam Support layer Foam is CertiPUR-US Certified for durability, performance, and content 10 year limited warranty Our patented compression technology allows our mattresses to be compressed, rolled and shipped in a box via FedEx Night Therapy mattresses are clinically proven to help you fall asleep faster, and sleep more soundly