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A mattress topper on a boxspring mattress. A mattress pad, mattress topper, or underpad is designed to lie atop a mattress.Made from a variety of materials including wool, cotton, memory foam, feather and latex, [1] its function is to provide an extra layer of comfort, especially when the existing mattress is worn or uncomfortable.
A mattress protector (also mattress cover, mattress pad may mean this or a mattress topper [1]) is an item of removable bedding that sits on top of, or encases, a mattress to protect it. Some mattress protectors also provide protection to the person sleeping on the mattress from allergens and irritants such as dust mites , bed bugs , mold , and ...
Protect-A-Bed’s mattress protector was originally developed and introduced in South Africa in 1980 under the name SnugFit. [2] [3] Protect-A-Bed was incorporated in 2000 to distribute unique waterproof mattress protectors in the United States. By 2003, the business had grown to revenues in excess of $3.5 million and was represented in 40 states.
High density foam Similar to memory foam mattresses, a high density foam mattress uses a more compact foam typically made from polyurethane. This kind of foam is made largely from open cells that are packed together tightly. [24] High density foam mattresses offer comfort and longevity because they are more dense than a traditional foam mattress.
Tempur-Pedic International, Inc., now part of Tempur Sealy International, is a manufacturer and distributor of mattresses and pillows made from viscoelastic foam. The company is headquartered on the Coldstream Research Campus in Lexington, Kentucky and has manufacturing plants in Duffield, Virginia and Albuquerque, New Mexico. [1] [2]
The fitted sheet may also be secured using a drawstring instead of elastic. The purpose of a fitted bottom sheet is to keep it from slipping off the mattress while the bed is in use. A particular way of folding and tucking while making the bed, known as "hospital corners," is sometimes used when the bottom sheet is flat rather than fitted.
The use of foam additives to water for extinguishment dates back to an English patent in 1877 for a method to produce chemical foam (Liebson, 1991, p. xi). The Royal Navy experimented with agents foamed by means of compressed air in the 1930s (Darley, 1994) and the United States Navy was using compressed air foam systems (CAFS) in the 1940s for ...
All types of foam are widely used as core material in sandwich-structured composite materials. The earliest known engineering use of cellular solids is with wood, which in its dry form is a closed-cell foam composed of lignin, cellulose, and air. From the early 20th century, various types of specially manufactured solid foams came into use.