The Thornhill Hybrid mattress set by Sealy features SealyCool fabric technology that absorbs, stores and releases the heat for optimum climate control, ultra-stretch Premium cover designed to stretch around your body four ways and recover quickly for maximum conformance, a layer of SealyEnvelop memory foam for a more breathable and comfortable sleep surface, ComfortSense memory foam, DuraFlex coil edge, and the Zoned Pocket Coil for more targeted support and reduced motion transfer. This mattress will bring all the support and comfort you need to get a goodnight sleep.