A mattress component includes first and second layers to be assembled in a mattress over which a user will lie. The first layer of a first material has different properties than the second layer of a second material. The second layer has a surface underlying the surface of the first layer. Mating patterns...http://www.google.co.uk/patents/US7574762?utm_source=gb-gplus-sharePatent US7574762 - Multilayered mattress component
