"Calpack, kalpak, or qalpaq (from Turkish: kalpak [kaɫˈpak]; Kazakh: қалпақ, Kyrgyz: калпак, both [qɑlˈpɑq]; Bulgarian: калпак; Greek: καλπάκι (kalpaki); Polish: kołpak; Ukrainian: ковпак, kovpak) is a high-crowned cap (usually made of felt or sheepskin) worn by Circassians, Dagestanis, Chechens, men in Turkey, Ukraine, the Balkans and throughout Central Asia and the Caucasus.
The kalpak is used to keep the head warm in winter and shade out the sun during summer. There are different kalpaks for different seasons, with kalpaks used in winter being thicker and the ones used in summer being thinner but broader for shading purposes." - (en.wikipedia.org 04.07.2021)
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