Serta Willingham Super Pillow Top Mattress, Queen The Serta perfect sleeper is the only official mattress of the national sleep foundation (NSF), designed to help address 5 common sleep problems Ever cool memory foam: the unique open-cell structure of Sertas exclusive and breakthrough foam makes it more breathable, to dissipate heat away Custom support individual advantage 886: features ventilated wrapped carbon steel coils that react individually to provide conformability Queen mattress only; queen foundation is purchased separately; Available options include flat, adjustable, and split for small spaces Measures 79.5 Inches long by 60 inches wide by 15.5 Inches high; 10 year manufacturer warranty