The Sealy Posturepedic Hybrid medium mattress combines lasting comfort and superior support to help maintain natural body alignment and reduce nagging Bed AchesTM. The orthopedic-inspired Posturepedic Support System features exclusive PrecisionFit Coils, arranged right where you need them. Plus the Coil Edge provides a solid surface that's built to last. The hybrid construction combines these coils with Sealy memory foam, creating an ideal sleep surface.