This upgraded spring mattress set features motion-reducing Response™ Encased Coils for all-over comfort, and a reinforced foam center third for targeted back and core support. The StableEdge™ Pro increases durability, while the knit cover with MoistureProtect™ helps to keep you cool, and Surface-Guard Technology™ keeps the mattress protected. This mattress will bring all the support and comfort you need to get a good night's sleep.