High grade memory foam and temperature regulating fabric. Beneath the memory foam is a layer of 7 zone foam with varied levels of tension targeting different body parts. Covered with revolutionary Tencel, a material with the strength of polyester and the softness of silk. The spring unit is sealy's own posturepedic open coil system, known for its orthopaedic design. And buy this Millionaire Memory Was £349.00 Now £339.00.