Sealy mattresses do not typically come with a box spring or foundation included in the purchase price. Instead, they are sold separately, allowing customers to choose the best foundation option that suits their needs. Sealy offers a variety of foundations, including traditional box springs and solid platform bases, which provide the necessary support for their mattresses. It is important to select a compatible foundation to ensure optimal performance and comfort of the mattress. Customers seeking to enhance their sleeping experience should consider the various options available, as the right foundation can contribute significantly to the overall comfort and durability of the mattress. For more information about the specific foundation options available for different Sealy mattress models, customers may want to explore the Sealy website where further details are provided.