A fabric that is a non-fabric, obtained not through the intertwining of threads, but through the compacting of fibers by various methods. The most common felts are made from wool, in order to exploit its tendency, under special conditions, to become matted. Used for clothing and accessories, felt gave its name to a classic hat, worn by men and women, with an upturned brim and a crown decorated with a grosgrain ribbon. It was a basic accessory from the 1920s on, until hats fell out of favor in the 1970s.