Sealy Posturepedic Hybrid Cobalt Firm mattress features individually encased coils to provide a better level of contoured support. This is called the Sealy Embrace Premier Coil System, which also features a “Zoned” design which increases the coil count in the center of the mattress right where the majority of your body weight will be. Combine this with the CoreSupport Center that adds additional gel memory foam over the middle third of the mattress you have a recipe for incredibly comfortable support. This is a firm mattress so it is ideal for back and stomach sleepers, with the gel memory foam in the top layers. Sealy Posturepedic Hybrid Cobalt Firm matches Sealy’s Reflexion UP adjustable base that is built to fit within most standard beds. The UP base gives you the ability to raise the head of your mattress up or lower it to suit your comfort needs. You are able to raise your head up to about a 65 degree angle. The wired remote provides simple and effortless control over the motion of the bed. The UP is designed to be placed directly in standard bed frames, replacing the box spring. King and California King sizes feature a split base which is convenient for you and your partner.