The Pearce firm mattress features Serta’s cool action gel memory foam, the world’s first premium memory foam infused with the support and cooling touch of Serta’s Micro Support gel – now available for the first time in perfect sleeper. It is designed with a unique set of features to help solve 5 common sleep problems: 1. Helps reduce tossing and turning with cool action gel memory foam 2. Encourages proper back support and alignment with the custom support individual advantage 886 innerspring 3. Promotes a balanced sleep temperature with cool balance elite technology 4. Minimizes impact from partner movement with our True Sense 4.0 Design with 4-way motion isolation 5. Resists sagging and edge roll-off with Serta’s comfort last construction plus total edge foam encasement this mattress also features a layer of Serta support foam to give it a firmer feel at the surface and is compatible with Serta’s adjustable foundations, including the pivot head-up and motion essentials ii models. Serta’s Firm mattresses offer classic tailoring with fewer plush comfort layers at the surface when compared to our plush and pillow top models. These mattresses are recommended for those who prefer a harder sleep surface.