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 also wear top hats on special occasions. The custom is said to have started at the Bevis Marks Synagogue in London on a hot day, when the "Chazzan" was preparing for a service and decided that it was too hot to wear his wig, throwing it out of the window in a fit of bad temper. He then found that his tricorn hat was too big, as it had been made to fit over the wig, and so wore his top hat instead. Notes Further reading Top hat A top hat, beaver hat, high hat, silk hat, cylinder hat, chimney