The Serenity is really a medium soft and ultra supportive polyurethane foam mattress. The duvet is really a natural care cover that is given soothing natural aloe vera, having a box-wave stitch. It's got 3 layers of polyurethane foam, equalling 5.5" together with 7.5" of High Resiliency Base Foam. See bottom of description for foam details.
Tempurpedic soft mattressPhyto-Foam: The hallmark of our green-reliant materials. Depends on plant-based materials. Bamboo infusion creates one of the most breathable, heat dissipating memory foams on the market. As well as allowing the optimal cooling surface, the bamboo infusion whisks away moisture to make sure a dry, cool nights sleep. (Density Rating: 4.2)