Experience the best of Beautyrest®, featuring advanced temperature management technology, Micro Diamond™ Memory Foam, Self-Response™ Latex, and advanced, Triple-Stranded Pocketed Coil® Technology for conforming support and motion separation. Two layers of 2K Nano Coils, for a total of 4K Nano Coils, offer a specialized upgrade as they conform to your body for enhanced, individualized support. With the inclusion of 4K Nano Coils plus additional layers of premium foams, the Series Four model is the most exclusive offering in the Beautyrest Black® Collection. With the inclusion of premier materials and advanced sleep technology, this Collection optimally aligns at the intersection of luxury and innovation for an extraordinarily comfortable sleep. For the person who likes cushy comfort that responds to your movement with a soft-yet-supportive feel and a cloud-like top layer Triple-Stranded Pocketed Coil® Technology offers our most advanced level of individualized support and motion separation, so you can rest undisturbed 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 Two layers of 2K Nano Coils enhance conformability for the highest level of premium, individualized support Specifically designed to work together with your Beautyrest Black® mattress, this 9" Beautyrest Black® foundation offers long-lasting support and reduced motion for restful night’s sleep Mattress Top Type: Pillow Top Mattress Type: Innerspring Included: 1 Mattress(es), 1 Box Spring(s) Features: Temperature Regulating, Cooling Layer, Wrapped Coils, Full Support, Foam Layer, Cushioning Layer Additional Information: Conforms To Body, Relieves Pressure Points, Suitable for Adjustable Bed Frames, Eliminates Motion Transfer Coil Count: 696 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Xl Measurements: 80 Length/Inches, 17.25 Height/Inches, 38 Width/Inches Maximum Weight Limit: 850 Lbs Base Material: 70% Polyurethane, 30% Metal Comfort Type: Plush Mattress + Box Spring Measurements: 80 Length/Inches, 38 Width/Inches, 26.25 Height/Inches Care: Spot Clean Certifications And Listings: Certipur-Us Certified Mattress Height: 17.25" Country of Origin: Made in US Set includes mattress plus box spring/foundation. King and Cal. King mattress sets feature 2-piece side-by-side foundations for easier navigation in tight spaces.