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Ushanka is Russian hat with round crown and ear flaps, usually made of fur. This hat is one of the symbols of the Soviet Union because it was developed and popularized in Russia during Civil War. Today ushanka is standard winter military hat in many countries, but also a fashioned hat made of different materials, not just fur.
On of the symbols of conquering the Wild West is, of course, Stetson Cowboy Hat. Because of its high quality it was a head gear of choice for all that roamed the planes of American West in 19th century. You can find out more about history of Stetson hats here.
The fez is a red short cylinder with a tassel on the top of it. It was popularized during Ottoman period, but still is an icon of Ottoman culture. Fez was used in the Middle East, Eastern Europe, and North Africa, so it's unclear where were its origins. It was a regular part of uniforms of many countries and today is mostly exotic fashion item and part of national costumes.
Hats are a part of human wardrobe for centuries. With different uses, from protection to fashion statement they changed through time and changed with how we see ourselves. Learn more about history of hats.