Kolpik

In Ashkenazi Jewish tradition, a kolpik is a type of traditional headgear worn in families of some Chassidic "rebbes" (Hasidic rabbis) of Galician or Hungarian dynastic descent, by their unmarried children on the Sabbath (Shabbat), and by some "rebbes" on some special occasions other than Shabbat or major holidays. The kolpik is made from brown fur, as opposed to a "spodik", worn by Polish chassidic dynasties, which is fashioned out of black fur. The shtreimel, another similar type of fur hat worn by Hasidim, are shorter in height, wider, and disc-shaped, while kolpiks are taller, thinner in bulk, and of cylindrical shape.
It is seen as an intermediate level garment between "Shabbat" and weekday dress.
The days that some "rebbes" don a "kolpik" include:
It is often thought, that Jews adopted wearing fur hats from the Eastern Europeans, possibly from the nobility.
Joseph Margoshes (1866–1955) in his memoir "A World Apart: A Memoir of Jewish Life in Nineteenth Century Galicia" writes regarding Rabbi Shimon Sofer's election to the Imperial Council of Austria: