King mattress only. King size is 76-inch by 80-inch. Comes with 20 year warranty. Made with 100-percent memory foam with dual airflow. All items new and shipped in original packaging. Don't be fooled into buying an -inchoriginal-inch brand name mattress for no reason. Our mattress is guaranteed to feel and perform the same or your money back.. Why memory foam mattresses the most popular mattresses we sell. It uses the visco-elastic memory foam technology developed by nasa to sense your body's weight and temperature and then gently conform to your shape to minimize pressure points and reduce tossing and turning. We use only the best quality products available on the market today. This mattress is made of 5-inch 5.3-pound memory foam and 7-inch high resilience polyurethane base foam. The best firmness retention foam in the industry. To minimize shipping fees and for ease of handling during delivery, this mattress has been vacuum packed. Rest ured this does not compromise the quality or comfort of the mattress and that the mattress will conform to its proper size within 1 - 2 hours.