A shtreimel is a fur

Fur

Fur is a synonym for hair, used more in reference to non-human animals, usually mammals; particularly those with extensives body hair coverage. The term is sometimes used to refer to the body hair of an animal as a complete coat, also known as the "pelage". Fur is also used to refer to animal...

 hat worn by many married haredi Jewish

Haredi Judaism

Haredi or Charedi/Chareidi Judaism is the most conservative form of Orthodox Judaism, often referred to as ultra-Orthodox. A follower of Haredi Judaism is called a Haredi ....

 men, particularly (although not exclusively) members of Hasidic

Hasidic Judaism

Hasidic Judaism or Hasidism, from the Hebrew —Ḥasidut in Sephardi, Chasidus in Ashkenazi, meaning "piety" , is a branch of Orthodox Judaism that promotes spirituality and joy through the popularisation and internalisation of Jewish mysticism as the fundamental aspects of the Jewish faith...

 groups, on Shabbat

Shabbat

Shabbat is the seventh day of the Jewish week and a day of rest in Judaism. Shabbat is observed from a few minutes before sunset on Friday evening until a few minutes after when one would expect to be able to see three stars in the sky on Saturday night. The exact times, therefore, differ from...

and Jewish holiday

Jewish holiday

Jewish holidays are days observed by Jews as holy or secular commemorations of important events in Jewish history. In Hebrew, Jewish holidays and festivals, depending on their nature, may be called yom tov or chag or ta'anit...

s and other festive occasions. In Jerusalem, the shtreimel is also worn by 'Yerushalmi' Jews (non-Hasidim who belong to the original Ashkenazi community of Jerusalem, also known as Perushim

Perushim

The Perushim were disciples of the Vilna Gaon, Rabbi Elijah ben Solomon Zalman, who left Lithuania at the beginning of the 19th century to settle in the Land of Israel, then under Ottoman rule...

). The shtreimel is generally worn only after marriage, except in many Yerushalmi communities, where boys wear it from their bar mitzvah.