Whether youre an early riser or night owl, The Sealy Holst Elevate Posturepedic Mattress mattress is designed to support you unconditionally. To provide the best support, your mattress should allow your spine to maintain it's neutral posture whilst you sleep, reducing muscular tension and strain. Backed by scientific research, Sealy Posturepedic technology works to provide correct support by aligning the body position during rest. It begins with the AlignSupport® coil, a unique two-stage spring system that has been expertly designed and tested right here at Sealy. Its unique geometry senses your body as it meets the mattress, providing the initial response. Followed by deep down support that sits at the very heart of the coil to evenly distribute your bodys weight. Its twice tempered too, providing dependable performance, year after year. Each and every Sealy Posturepedic is UniCased®. The proprietary keys lock into place for the ultimate stability, bringing structure to every point