If you are looking for a firm mattress delivering premium support, the Perfect Sleeper® Shadowrock mattress set is the one for you. Using Serta's innovative SmartSurface with MicroSupport® Gel to promote a balanced sleep temperature, this quality mattress is designed to increase airflow to create the ideal sleep environment. Cool Twist Gel Memory foam, an exclusive liquid gel-enhanced memory foam that moves heat away from your body, works together with layers of PillowSoft and Support foams to provide the pressure point relieving benefits of memory foam without the sweaty sleep often associated with it. DuoSense coils individually adjust to each curve of your body to deliver the undisturbed sleep you need. 10 Year Warranty