Our Essentials go beyond basic, so you can get the comfort and support you need at a price that suits your budget. This 12-inch memory foam hybrid mattress has the innovative combination of adaptive memory foam and supportive coils for a uniquely refreshing nightâs sleep, so you wonât have to compromise to get the medium-firm comfort you want. The SolidEdge HD System provides a reinforced foam border that gives you a larger sleep surface. And with enduring quality and a history of excellence, you can rest easy knowing weâve got your back.