Montenegrin cap
The Montenegrin cap (Serbian: Црногорска капа, romanized: Crnogorska kapa), refers to a flat cylindrical cap with a red top and black brim, traditionally worn in Old Montenegro and Eastern Herzegovina. It was further popularized by Prince-Bishop Petar II Petrović-Njegoš in the mid-1840s as a replacement for the then-popular Ottoman red fez. It is the common headgear in the traditional costume of Montenegro.
The cap (or rather, hat) is in the shape of a flat cylinder, with a red colour upper surface called tepelak, and an external wrap of cotton or silk fabric in black colour called deravija. The deravija was easily worn out and exchanged. It is also called zavratka (завратка) in Herzegovina.