The Beauty Sleep® 11.5" firm quilted mattress is designed for your lifestyle. With a traditional quilted top panel, our Beauty Sleep® 11.5" firm quilted mattress features high quality foams including our AirCool® Foam with channeled design for cushioned airflow and comfort foam to meet your comfort needs all night long. Plus, firm 815 Original Beautyrest® Pocketed Coils with the Beauty Sleep® 11.5" firm quilted mattress provide consistent, supportive sleep at a value designed for your lifestyle. Firm quilted innerspring Featuring firm 815 Original Beautyrest® Pocketed Coil Technology for consistent, comfortable support AirCool® Foam provides cool, comfortable sleep with a unique channeled design that allows airflow through the mattress Comfort foam that meets your preferred level of comfort, so you sleep deeply all night long All Beauty Sleep® mattresses are built with CertiPUR-US® Certified foams All Beauty Sleep® mattresses are assembled in the USA All Beauty Sleep® mattresses are compatible with adjustable base All Beauty Sleep® mattresses have a 10 year limited warranty  If you are looking to add a little height to your bed or just simply extend the life of your Beauty Sleep® mattress, the 9" Beauty Sleep® flat mattress foundation is the perfect solution. Designed to provide long-lasting comfort, the Beauty Sleep® flat bed foundation includes a spruce framework and welded steel elements for greater support and durability.  Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Box Spring(s), 1 Mattress(es) Features: Foam Layer, Cooling Layer, Wrapped Coils, Full Support, Cushioning Layer Additional Information: Suitable for Adjustable Bed Frames, Eliminates Motion Transfer, Relieves Pressure Points, Conforms To Body Coil Count: 324 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 38 Width/Inches, 74.5 Length/Inches, 11.5 Height/Inches Maximum Weight Limit: 850 Lbs Base Material: 70% Polyurethane, 30% Metal Comfort Type: Firm Mattress + Box Spring Measurements: 74.5 Length/Inches, 20.5 Height/Inches, 38 Width/Inches Care: Spot Clean Certifications And Listings: Certipur-Us Certified 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.