thumb|300px|Two-sided, innerspring pillow-top mattress on box-spring foundation with a woven damask cover also called a mattress sheet
A mattress is a cushioned surface designed to be placed on a supporting foundation, typically made with innerspring coils and topped with padding for comfort. It matters because it's the primary surface people sleep on, making its quality and construction important for sleep comfort and support.
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thumb|300px|Two-sided, innerspring pillow-top mattress on box-spring foundation with a woven damask cover also called a mattress sheet
A mattress is a large, usually rectangular pad for supporting a person lying down, especially for sleeping. It is designed to be used as a bed, or on a bed frame as part of a bed. Mattresses may consist of a quilted or similarly fastened case, usually of heavy cloth, containing materials such as hair, straw, cotton, foam, rubber, or a framework of metal springs. Mattresses may also be filled with air or water.
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