Twilled cloth is a type of fabric that is characterized by its diagonal pattern of parallel ridges or ribs. The term twilled cloth is often used to refer to fabrics such as serge, REP, and DENIM. Serge is a type of twill fabric that is made from wool, cotton, or synthetic fibers. REP is a type of twill fabric that is made from silk or cotton. DENIM is a type of twill fabric that is made from cotton and is most commonly used for jeans.