Serta's Luxe Chamblee 12.5"" Firm Mattress offers an exceptional sleep experience through advanced bedding technology exclusive to Serta. Through layers of memory foam and the 825 Edition Support Coil System, this mattress is designed to deliver significant support favored by back and stomach sleepers. Enhancing this are a combination of cutting-edge memory foams that work together to deliver extra support, while Cool Twist Gel Memory Foam promotes airflow and heat dissipation, providing a cooler sleep surface.