This Northstar Hybrid Firm Tight Top mattress set by Sealy Posturepedic Luxury features the SealyCool™ Fabric technology that absorbs, stores and releases heat for optimum climate control, SupremeLoft™ Quilt featuring Silk and Wool, a layer of GelSense™ Memory Foam designed to sense and respond to uour body's unique shape to provide personalized comfort and support, Targeted SmartLatex™ to provide uplifting support for a weightless feel, SealySupport™ Gel HD Foam, and the SolidEdge™ Pro Coil Edge system with SealyMax™ Core System featuring SealyResponse™ Pro and SolidSupport™ Coils.