The Serta Perfect Sleeper Elite Lakewood Plush Mattress by Serta has a premium "Smart Surface" Cool-Gel Knit Top and 1/2" layer of Serta's Premium Gel-Twist Infused Memory Foam to ensure great breathability and exceptional comfort. Built with a top-of-the-line Flex-Zone continuous coil support system, the Lakewood Plush comes with a 10 year non-prorated warranty for more than 1 1/2" body impressions. The Flex-Zone coil is a breakthrough design that features a continual wire for strength, yet reduces motion by adding increased flex. This mattress is great for adult side and back sleepers. Serta's Gel-Twist memory foam adjusts to each sleeper's unique body type, is heat resistant, and prevents motion transfer. Enjoy the plush surface of memory foam and long-lasting support!