A unique Crossover™ technology mattress, the Beautyrest® NxG® Series features Advanced Memory Foam for superior heat dissipation, quicker recovery and consistent comfort, a 1000 Density Super Pocketed Coil® Spring Unit, Ultra 360° foam encasement, luxurious fabrics and high performance foam layers. NxG® Advanced Memory Foam: Created in a special vacuum-sealed chamber to increase airflow and resilience, Beautyrest® NxG® Advanced Memory Foam not only responds quickly to your movements, but also dissipates heat to help keep you at your ideal sleeping temperature. Support: 1000 Density Super Pocketed Coil® Unit* Higher count of Super Pocketed Coil® springs increases motion separation while conforming to your body's unique shape. Total Surround Beauty-Edge® Foam Encasement Features QuantumLock™ for a maximized sleeping surface and increased durability. Energy Foam™ support base adds stability as part of Simmons' patented no-flip construction. Triton® foundation with a PowerBeam® brace for greater strength. No-Flip Design The no-flip design and high performance coil unit offer long-lasting durability. Comfort: Patent-pending Evenloft™ Design featuring Body Contouring Stretch Knit Fabric Plush yet durable high performance foams for maximum comfort and support. BeautyStyle™ luxury fabrics and aesthetics for a more pleasing and sophisticated look. BeautyFeel™ design with the broadest range of comfort options in the industry including Firm, Luxury Firm, Plush, Plush/Firm and Pillow Top.