The Sealy® Wellmont mattress is our most premium innerspring model combining the enhanced support of our encased coil system with the high-density Duraflex™ coil edge system for increased durability. This mattress includes multiple layers of our Sealy Comfort™ and Sealy Support™ gel forms to maximize comfort and support, plus an added layer of memory foam in the Core Support™ center to provide additional pressure-relieving support for the heaviest part of your body. Our 9" Sealy Stable Support™ Flat Foundation is designed to support your mattress for years of comfort to come. This durable foundation is engineered to provide a solid base for your mattress and upholstery to complement any Sealy® mattress. The 9" height matches a traditional box spring.   Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Mattress(es), 1 Box Spring(s) Features: Non-Toxic, Hypoallergenic, Fade Resistant, Adjustable Base Compatible, Wrapped Coils, Full Support, Antimicrobial, Cushioning Layer, Foam Layer Additional Information: Suitable for Adjustable Bed Frames, Relieves Pressure Points, Eliminates Motion Transfer Coil Count: 601 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 37.75 Width/Inches, 74 Length/Inches, 14.5 Height/Inches Maximum Weight Limit: 500 Lbs Base Material: 70% Metal, 30% Polyurethane Comfort Type: Medium Mattress + Box Spring Measurements: 23.5 Height/Inches Care: Spot Clean Certifications And Listings: Cpsc - 16 Cfr 1632 Compliant, Certipur-Us Certified, Cpsc - 16 Cfr 1633 Compliant Country of Origin: Made in US This product is responsibly packaged or labeled using recycled, alternative materials, or items designed to reduce future environmental impact. 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. This mattress meets the requirements of 16CFR Part 1632 (federal flammability (open flame) standard for mattresses and mattress pads This mattress meets the requirements of 16CFR Part 1633 (federal flammability (open flame) standard for mattress sets) when used with foundation