Boudoir caps were worn in the 19^th and early 20^th Centuries to protect the coiffure while undergoing the arduous process of dressing or to cover undressed hair. As long hair was bobbed short in the late Teens and 1920s, this was unnecessary due to the shorter hair lengths. Boudoir caps were flattering caps in light colors usually made in a lightweight, slick silk that would not catch on the hair, and were often threaded with ribbon to snug to the head to keep in place. In recent years, their descendant is the functional curler cap, worn to hide hair curlers.