Twilled fabric is a type of woven fabric that has a distinct pattern of diagonal parallel ribs. JEAN, Surah, Serge, DENIM, DRILL, Bombazine, Silesia, CHINO, REP, GABARDINE, FUSTIAN, and Dungaree are all types of twilled fabric. JEAN is a sturdy cotton twill fabric, while Surah is a lightweight silk twill fabric. Serge is a wool twill fabric, and DENIM is a cotton twill fabric. DRILL is a strong cotton twill fabric, and Bombazine is a twill fabric made from silk and wool. Silesia is a cotton twill fabric, and CHINO is a lightweight cotton twill fabric. REP is a twill fabric made from silk and wool, and GABARDINE is a twill fabric made from worsted wool. FUSTIAN is a twill fabric made from cotton and linen, and Dungaree is a heavy cotton twill fabric.