The Sealy Hybrid Kelburn II Performance??? Collection Mattresses combine the responsive support of an innerspring with the body-conforming comfort of memory foam. This unique hybrid style provides the most effective of both: gently-conforming comfort on prime with stable deep down support below. Exclusive Posturepedic Technology??? with 20percent more coils to deliver strengthened support where you need it most. Altogether the Sealy Hybrid is the entire package providing Sealy is best in comfort support and cooling technology. .