- Cuculla: A hood or cowl that was attached to the monk's tunic.
- Cappa: A long, loose cloak that was worn over the tunic.
- Biretta: A square or rectangular hat that was worn on top of the head.
- Mitre: A tall, pointed hat that was worn by bishops and abbots.
- Pileus: A round, brimless hat that was worn by some monks.
- Reticulated cowl: Cowl with openings for eyes and mouth, usually made of leather.
- Diadem: A headband or crown that was worn by some monks.
In addition to these hats, medieval monks also sometimes wore other types of head coverings, such as scarves or veils. The type of hat or head covering that a monk wore depended on a number of factors, including their order, their rank, and the occasion.