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The History of Bed Frames Mattresses are mats or cushions that are ordinarily put on top of mattress frames, typically employed for sleeping on or lying down upon. http://sleeppainfree.net/ "mattress" has its roots from the Arabic term "materials," -- "to throw," "place where something is thrown," "mat," or "cushion." Arabs have the custom of sleeping on mats or cushions thrown on the floor. In the time of the Crusades, Europeans became exposed to the custom, adapted it and later on brought back the habit with them to their families. The custom spread throughout their homelands, finally spreading throughout the world. The word "materas" then gradually evolve into the word we are now comfortable with - " mattress."