Top hat top hat is a hard, black silk hat, with fur now often used. The acceptable colors of hats are much as they have traditionally been, with "white" hats (which are actually grey), a daytime racing color, worn at the less formal occasions demanding a top hat, such as Royal Ascot, or with a morning suit. In the U.S. top hats are worn widely in coaching, a driven horse discipline as well as for formal riding to hounds. The collapsible silk opera hat, or "crush hat", is still worn on occasions, and black in color if worn with evening wear as
Top hat standard covering is now fur plush or "melusine" as (the London hat merchant) Christys' calls it. A grey flat fur felt top hat is the popular alternative. It is common to see top hats in stiff wool felt and even soft wool though these are not considered on the same level as the silk or fur plush or grey felt varieties. The standard crown shape nowadays is the 'semi-bell crown'; 'full bell crowns' and 'stovepipe' shaped toppers are rarer. Because of the rarity of vintage silk hats, and the expense of modern top hats, the vintage/antique market is very lively,