Bowler hat
The bowler was the most popular hat in the American Old West. It was "the hat that won the West". Both cowboys and railroad workers preferred the hat because it would not blow off easily in strong wind while riding a horse, or when sticking one's head out the window of a speeding train. It was worn by both lawmen and outlaws, including Bat Masterson, Butch Cassidy, Black Bart, and Billy the Kid. In America the hat came to be commonly known as the derby, and Wild West outlaw Marion Hedgepeth was commonly referred to as "the Derby Kid".