Simmons Beautyrest World Class Black River Bay Plush Mattress Set, Queen The redesigned Beauytrest World Class line features the enhanced comfort and support of 1000 density Beautyrest Super Pocketed Coil springs NXG Next Generation Advanced Memory Foam and Premium Foams which have gone through the newly patented Transflexion Comfort Technology process ensuring that the bed will feel consistently comfortable throughout the life of the mattress Total Surround BeautyEdge Foam Encasement featuring QuantumLock for foam rail integrity and sleeping comfort right to the edge Luxurious BeautyStyle fabrics and aesthetics compliment the sleep surface while AirFeel foam quilting and other upholstery PurFoams enhance the inherent comfort of the Pocketed Coil springs Durable Triton foundation with Power Beams for greater strength