carpet

A carpet or rug is a textile floor covering typically consisting of an upper layer of pile attached to a backing underneath. In Europe, the pile was traditionally made from wool, but since the 20th century, synthetic fibres such as polypropylene, nylon, and polyester have often been used as cheaper alternatives. The pile usually consists of twisted tufts that are typically heat-treated to maintain their structure. The terms carpet and rug can be interchangeable, though they have different definitions; rugs are generally loose-laid and of a smaller size, though since the since the 19th century, there have been trends to produce wall-to-wall carpets for rooms that are fixed in place.