Elevate your sleep to a luxurious reward night after night. As a part of our most advanced collection yet, beautyrest black® c-class offers up to 21% more support where your body needs it the most. With help from our new plant-based cooling technology, the collection provides up to 18% more cooling power to keep you comfortable as you fall asleep and all night long. In addition to our support and cooling systems, beautyrest black® c-class includes comfort and pressure-relieving upgrades for up to 18% more overall pressure relief than beautyrest black® l-class models. A luxurious layer, made with silk, alpaca and cashmere provides unmatched comfort and breathability while self-response™ latex ensures individualized support for different parts of your body. These innovative features are paired with an all-new modern design to create a first-class sleep experience that will leave you feeling invigorated to take on your day. Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Mattress(es), 1 Box Spring(s) Features: Cooling, Wrapped Coils, Full Support, Temperature Regulating, Cooling Layer, Cushioning Layer, Non-Toxic, Antimicrobial, Foam Layer, Adjustable Base Compatible Additional Information: Suitable for Adjustable Bed Frames, Eliminates Motion Transfer, Conforms To Body, Relieves Pressure Points Coil Count: 513 Coils Manufacturer Warranty: 10 Year Bed Size: Twin Xl Maximum Weight Limit: 1000 Lbs Base Material: 50% Wood, 50% Metal Comfort Type: Medium Mattress + Box Spring Measurements: 79.5 Length/Inches, 39 Width/Inches, 22.75 Depth/Inches Care: Spot Clean Certifications And Listings: Certipur-Us Certified Country of Origin: Made in US Visit our Furniture & Mattress Customer Care Center for delivery options, protection plans and other services. Problem with an order or need help with a return? Our Furniture & Mattress Customer Service agents will be happy to help. Give us a call at 1-800-442-7902 Don’t forget to print off your delivery checklist to avoid any delays or issues when delivering your item. 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.