Opera hat characteristic snapping sound heard upon opening a gibus suggested a third name, the "chapeau claque", "claque" being the French word for "slap". 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
Top hat in the Bank of England and City stockbroking, and boys at some public schools. All the civilian members of the Japanese delegation that signed the Japanese Instrument of Surrender on 2 September 1945, wore top hats, reflecting common diplomatic practice at the time. The top hat persisted in politics and international diplomacy for many years. In the Soviet Union, there was debate as to whether its diplomats should follow the international conventions and wear a top hat. Instead a diplomatic uniform with peaked cap for formal occasions was adopted. Top hats were part of formal wear for U.S. presidential inaugurations