Designed and tested with input from the National Sleep Foundation, this Serta Perfect Sleeper® offers a terrific value plus comfort and support. It also provides: Luxury firm support Advanced Comfort Quilt® Pillo-fill® Soft Convoluted foam ½" Comfort Foam Serta® Insulator ½" Memory Foam EuroCoil 3Zone 864 innerspring system with foam encasement - responds to individual body weights, shapes, sleep patterns and positions for exceptional support FireBlocker® 10 year non-prorated warranty for the set.