An assembly of textile fibres held together by mechanical interlocking in a random web or mat, by fusing of the fibres (in the case of thermoplastic fibers), or by bonding with a cementing medium such as starch, glue, casein, rubber, latex, or one of the cellulose derivatives or synthetic resins. Initially, the fibres may be oriented in one direction or may be deposited in a random manner. This web or sheet of fibres is bonded together by one of the methods described above. Normally, crimped fibres that range in length from 0.75 to 4.5 inches are used.

Nonwoven fabrics are used for expendable items such as hospitable sheets, napkins, diapers, wiping cloths, as the base material for coated fabrics, and in a variety of other applications. They can also be used for semi-disposable items and for permanent items such as interlinings.