Experience the best of Beautyrest®, featuring advanced temperature management technology, premium foams, and advanced, Triple-Stranded Pocketed Coil® Technology for conforming support and motion separation. 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 wants an ultra-supportive, firm feel with no sinking feeling. Triple-Stranded Pocketed Coil® Technology offers our most advanced level of individualized support and motion separation, so you can rest undisturbed. Specialized vertical fibers combine with an applied surface-cooling technology in an advanced feature designed to help transfer heat away from the body all night. Contouring foam adheres to the shape of your body for night after night of exceptional pressure relief. High-density, firm-feel comfort foam contours and conforms to your body, so you can experience a unique combination of comfort and support night after night. A unique, channeled design helps this high-density foam promote airflow for cool, enhanced pressure-relief. All our mattresses are proudly assembled in the USA. Adjustable base friendly. We stand by our Beautyrest mattresses with a 10-year limited warranty. Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Mattress(es) Features: Foam Layer, Cooling Layer, Wrapped Coils, Full Support, Temperature Regulating, Cushioning Layer Additional Information: Suitable for Adjustable Bed Frames, Eliminates Motion Transfer, Relieves Pressure Points, Conforms To Body Coil Count: 696 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Xl Measurements: 38 Width/Inches, 79.5 Depth/Inches, 13.5 Height/Inches Maximum Weight Limit: 850 Lbs Base Material: 70% Polyurethane, 30% Metal Comfort Type: Extra Firm Care: Spot Clean Certifications And Listings: Certipur-Us Certified Mattress Height: 13.5" Country of Origin: Made in US Includes mattress only. Mattress plus box spring option also available.