What hat does the hero of masked knight W wear?

This is a bowler hat, one of the top hats. Top hat was born in 1850. American W. Boller first made a black bowler hat out of hard felt, which was used by men in formal social occasions. Later, as a common top hat, it was introduced to the United States and called Derby hat. Top hats can be divided into top hats and small hats. The top hat has a very high crown (about 14 ~ 19 cm), such as the Eton hat worn by students of Eton College in England; Top hat was originally a German men's hat, also known as Hamburg hat. In the late Qing Dynasty, top hats were introduced to China. In the early years of the Republic of China, it was common in ceremonial occasions, so it was called top hat. China made hats by traditional craft. First, roll the wool into felt blank, then iron the helmet into a hat tire, and decorate the hat. Top hats made in Shengxifu, with soft wool, uniform color and durability, are exported all over the world. After 70' s of 19, western-style felt hats used in general occasions are eclectic and called top hats. Among them, women's top hats include Fidora hat, Brittany hat and knight hat (see figure). A hat made of fur, tweed, velvet, etc. , commonly known as cloth cap or seam cap. It is made of straw and bamboo, commonly known as straw hat, and belongs to the category of straw hat. Among them, the gold hat (made of velvet) is famous for its elegance.

The picture shows a bowler hat.