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 men's hat. The characteristic snapping sound heard upon opening a gibus suggested a third name, the "chapeau claque", "claque" being the French word for "slap". Until World War I the top hat was maintained as a standard item of formal outdoor wear by upper-class males for both daytime and evening usage. Considerations of convenience and expense meant however that it was increasingly superseded by soft hats for ordinary wear. By the end of World War II, it had become a comparative rarity, though it continued to be worn regularly in certain roles. In Britain these included holders of various positions