SleepTech_Mart2018-internet

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Mattresses may consist of a quilted or similarly fastened case, usually of heavy cloth, that contains hair,
straw, cotton, foam rubber, etc., or a framework of metal springs. Mattresses may also be filled with air
or water. Mattresses are made up of a variety of mattress components. And the quality of each one of
those mattress components has an important impact on the total quality of a mattress. Many parameters
such as pressure distribution, skin microclimate, hygiene, edge support, and long-term stability and
durability determine mattress quality.
Early mattresses contained a variety of natural materials including straw, feathers or horsehair. In the first
half of the 20th century, a typical mattress sold in North America had an innerspring core and cotton batting
or fiberfill. Modern mattresses usually contain either an innerspring core or materials such as latex,
viscoelastic or other flexible polyurethane foams. Other filling components include insulator pads over the
coils that prevent the bed’s upholstery layers from cupping down into the innerspring, as well as polyester
fiberfill in the bed’s top upholstery layers. In 1899 James Marshall introduced the first individually
wrapped pocketed spring coil mattress now commonly known as Marshall coils as described below.