A collapsible opera hat that can be flattened when not in use, invented in 19th-century France.
Named after Monsieur Gibus, a French hatter who invented the collapsible top hat around 1837. The French term 'chapeau claque' means 'clacking hat' referring to the sound it makes when opened.
The gibus is a perfect Victorian invention—fancy people wanted to look fancy at the opera but couldn't carry a full top hat, so they created one that folds up like a trick—it's practical elegance.
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