A Dutch cap or Dutch bonnet is a style of woman's hat associated with the traditional Dutch woman's costume. Usually made of white cotton or lace, it is characterized by triangular flaps or wings that turn up on either side.[1] It resembles some styles of nurse's hat.[2]
Also a term for a form of barrier contraceptive.[3]
References
^Wearing a Dutch costume, instructions for making iconic hat out of paper for a child's dress-up costume.