In the United States, this hat is known as "Derby." But in England it is known as Derby "bowler". Derby / bowler hat is a rigid dome-shaped with a small curved edge and is traditionally made stiff felt. It was created by an Englishman, James Coke in 1850. It was designed to protect the head. Peaking in popularity in the late 19th century, it has offered a midway between the aristocratic classes and the casual nature of soft hats worn by the small bourgeoisie. It was usually worn with suits or overcoats and symbolized the male dress. It was the traditional headwear gents London and became a British cultural icon. However, the British and American men stopped wearing hats in the 60s, and most young people in the 21st century have never seen a derby hat / bowler hat worn as part of the current guard dress.