"A carpet is a textile floor covering consisting of an upper layer of pile attached to a backing. The pile is generally either made from wool or fibers such as polypropylene, nylon or polyester and usually consists of twisted tufts which are often heat-treated to maintain their structure. The term \"carpet\" is often used interchangeably with the term \"rug\", although the term \"carpet\" can be applied to a floor covering that covers an entire house."@en . . . .