What is "fustian"?

Fustian is a type of fabric that originated in medieval Europe and was traditionally made of a blend of cotton and linen fibers. It is characterized by a ribbed texture, created by weaving the cotton or linen in a way that produces pronounced ridges or cords. Fustian can also be made with other fibers such as wool or silk, but the ribbed texture is the defining characteristic of the fabric. Historically, fustian was used to make a range of garments, from sturdy work clothes to more formal attire, and it remains popular today for items such as upholstery and drapery.