The Simmons® Sleep ThrillZzz adds an extra layer of comfort and luxury on top of the already-excellent support provided by the combination of its amazing core technology and its ultra comfortable foam support layers. This mattress ensures uninterrupted sleep by giving you a stable yet comfortable sleeping area. The Memory Foam within the mattress also creates an responsive sleeping surface to ease the pressure points resulting from varying sleeping positions. With the world-class coil mechanism at its core, you are guaranteed minimized bounce and shaking brought about by sudden motions during sleep. Sleep ThrillZzz assures that you receive all the value in this mattress by making sure every square inch is a stable sleeping area for you.