Sleep Master Memory Foam 9 Inch Airflow Mattress, King 2" memory foam layer, 2.5" cool Comfort Foam layer, Full support from high-density foam 4.5" layer Memory foam is infused with green tea, charcoal and natural plant oil for minimal use of petrol based chemical and works to eliminate orders Our patented compression technology allows our mattresses to be efficiently compressed, rolled and shipped in a box conveniently to your door All foam is CertiPUR-US Certified for durability, performance and content with 10-year warranty 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