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 wedding, wrapped around the head, and usually worn with a central hat. Babylonian Talmud (Moed Katan 15a, and Eruvin 84b), where the Aramaic word used for "habit" is "sudera" (Latin: sudarium) and which was usually worn by Jews with a central cap known in Aramaic as "kumtha." In Kiddushin 29b, there it mentions the Rabbi who refused to wear a "sudera" (habit) on his head until he was married, meaning, his head was only covered by a cap. Cf. , p. 364, s.v. sudarium.
