Those who prefer a firm mattress will be pleasantly surprised by the comfort enhancing technology utilized in the Sealy Summer Shower mattress set. Thin layers of innovative foams, including high density SuperSoft ActiveFlex and body contouring, temperature-regulating Gel Memory Foam, all encased in a BECOOL cover, create a comfortable sleep surface while maintaining a firm feel. The Gel Memory Foam CoreSupport Center offers additional deep down support to the center third of the mattress (holding the heaviest part of your body), while the patented Apex titanium coils offer a softer feel at the top with a firmer coil base. 10 Year Non-Prorated Warranty.