Experience the best of Beautyrest®, featuring advanced temperature management technology, Micro Diamond™ Memory Foam, and advanced, Triple-Stranded Pocketed Coil® Technology for conforming support and motion separation. Self-Response™ Latex offers a specialized upgrade for responsive pressure relief, as it contours to relieve your body’s unique pressure points while maximizing airflow for cool sleep every night. Plus, for an even more luxurious upgrade, Series Three Pillow Top models feature exclusive 2K Nano Coils for enhanced, individualized support throughout the night. With the inclusion of premier materials and advanced sleep technology, the Beautyrest Black® Collection optimally aligns at the intersection of luxury and innovation for an extraordinarily comfortable sleep. For the person who likes firm comfort and support with equal weight distribution. Triple-Stranded Pocketed Coil® Technology offers our most advanced level of individualized support and motion separation, so you can rest undisturbed. Cooling yarn, woven into the mattress surface, tops a layer of specialized vertical fibers in an advanced feature designed to help transfer heat away from the body all night. A layer of specialized foam is quilted into the sleep surface to unlock immediate, advanced pressure relief. A premium memory foam, infused with diamond particles, is designed to help move heat away from the body for a cool sleep. Ventilated latex layer maximizes airflow while contouring and conforming to your body for responsive pressure relief  Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Mattress(es) Features: Cooling Layer, Full Support, Cushioning Layer, Foam Layer, Temperature Regulating, Wrapped Coils Additional Information: Relieves Pressure Points, Suitable for Adjustable Bed Frames, Conforms To Body, Eliminates Motion Transfer Coil Count: 696 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Xl Measurements: 15 Height/Inches, 79.5 Length/Inches, 38 Width/Inches Maximum Weight Limit: 850 Lbs Base Material: 70% Polyurethane, 30% Metal Comfort Type: Firm Care: Spot Clean Certifications And Listings: Certipur-Us Certified Mattress Height: 15" Country of Origin: Made in US Includes mattress only. Mattress plus box spring option also available.