A type of traditional headgear worn in families of many Hasidicrabbis, by unmarried children on Shabbat and by rabbis on special occasions. It is a made from brown fur (as opposed to a spodik, worn by Polish Hasidic dynasties, which is fashioned out of black fur).
See also
kolpak
References
Israel, Yosef Rescuing the Rebbe of Belz: Belzer Chassidus, Mesorah Publications: 2005, →ISBN, page 42