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. 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/base. Larger size mattress sets may 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