Serta Perfect SleeperAmeris firm tight topTwin mattress with foundationPocketed coil innerspringCoil Count, Twin 529, Full 679Queen 850, King 10953 Zone Coil DesignHyperTouch comfort system1" Perfect pure fiber1/2" Serta gel  foam foam1" Perfect cool twist gel memory foam1" Serta balanced support foamBest edge support systemFR fiber10 year limited warranty