A sudarium (Latin) was a "sweat cloth", used for wiping the face clean.
Small cloths of various sorts, for which sudarium is a general term, played a role in Ancient Roman formal manners and court ceremonial, and many such uses transferred to Christian liturgical usage and art.
In Jewish usage, it is the cloth-like habit worn by Jewish men after a wedding, wrapped around the head, and usually worn with a central hat.
Another sudarium is found in Altmünster, Germany, and was supposedly given to Saint Bilihildis; it is locally venerated since the 15th century.
[2] In the Roman Catholic and other Western churches, the term sudarium has been used for several ornamental textile objects: The term Sudra (סודרא) for a headdress (habit) in Judaism is a loan from the Latin term.