Zinus 8 Inch Memory Foam Queen Mattress Mattress layers include a soft, comfort cover, High-density Foam, Memory Foam and High-density Base Support Foam. Our patented compression technology allows our mattresses to be efficiently compressed, rolled and shipped in a box conveniently to your door We recommend you open your mattress package within 72 hours of receipt and allow 48 hours for your new mattress to return to its original, plush shape CertiPUR-US Certified for durability, performance and content, with Limited 10 year warranty Cover fabric may vary.