A Caul is type of historical headress worn by women to cover tied-up hair. A fancy Cauls are often made of satin, fine silk, velvet or brocade, whereas simple Cauls would simply be made of white linen or cotton.
The Caul could be covered by a crespine or a mesh net to secure it from falling off.
A Caul is also the name of an Elizabethan hair net with a similar function.
Other names for Caul