Sleep Master Gel Infused Memory Foam 8 Inch Celliant Better Sleep Mattress, King Cover features the patented Celliant Sleep fiber, which is a specially formulated material designed to enhance oxygen levels in the body Active Response Foam layering system features 2 gel-infused memory foam with 1.5 Airflow foam for resiliency Only the Highest Quality Foam  Foam is CertiPUR-US Certified for durability, performance, and content Smartly Shipped - Our patented technology allows our mattresses to be efficiently compressed, rolled and shipped in a box conveniently to your door Worry free 10 year limited warranty