The Beautyrest® Select™ Firm model is constructed of quality materials to provide consistent comfort over the life of your mattress, while helping you get the supportive, restful sleep you desire with no sinking feeling. Featuring proprietary Stretch-Flex™ Fiber, DualCool™ Plus Technology, Pocketed Coil® Technology, and pressure relieving foams, the Beautyrest® Select™ Firm model will deliver dependable support and comfort to you every night for years to come.