About
A top-hat or top hat is a kind of tall, flat-crowned, broad-brimmed hat worn by men and was especially common in the 19th century. They were made from stiffened felt made from beaver fur or from silk.Later on, top-hats were sometimes given an internal hinged frame, making them collapsible. Such hats are often called "opera hats", though the term can be synonymous with any top-hat, or any tall formal men's hat.
I myself own one, together with its original case, and it's one of my most prized possessions.