Similar hats with a C-crown (with an indentation for the head in the top of the crown) are occasionally called fedoras. The brim goes all the way around, and often there will be a hat band as well. A trilby hat is somewhat similar to a fedora, but typically has a shorter brim, and the back of the brim is distinctively more sharply upturned as a result.
Originally a women's fashion into the 20th century, the fedora came into use in about 1919, as a men's middle-class clothing accessory. Its popularity soared, and eventually it eclipsed the similar-looking Homburg by the early 1920s.
The late 1950s switch from large lapels and ties to thin ones, resulted in shorter-brimmed hats, and this likely played a role in the fedora eventually being deemed a non-essential item. Also playing a part were the shrinking automobiles of the mid-1950s, which often made it difficult to wear a hat while driving. By the early 1970s, the fedora was seen as a dead fashion, typically only worn by older and/or more traditional men.
Source: Wikipedia > Fedora
What is QuickyWiki? QuickyWiki blends the depth of Wikipedia with the ease and speed of Cliffs Notes.