Opera hat Opera hat An opera hat, also called a chapeau claque or gibus, is a top hat variant that is collapsible through a spring system, originally intended for less spacious venues, such as theatre and opera visits. Typically made of satin in black colour, its advantage is that it folds vertically through a push or a snap on the top of the hat, in order to be conveniently stored in a wardrobe or under the seat. Invertably, it opens in the same one moment fashion by an easy push from underneath. Its French name "chapeau claque" is a composition of "chapeau",
Top hat the Law Courts and Lincoln's Inn, London by judges of the Chancery Division and Queen's Counsel. , top hats are still worn at some society events in the UK, notably at church weddings and racing meetings attended by members of the royal family, such as Royal Ascot. They remain part of the formal uniform of certain British institutions, such as the boy-choristers of King's College Choir. They are usually worn with morning dress or white tie, in dressage, and as part of servants' or doormen's livery. The top hat was frequently associated with the upper class, and was used by