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 (company) recognized by numerous awards including Canadian Innovation Exchange Top 20 Program, "Best Canadian Startup of the Year" at the TechVibes Canadian Startup Awards, and Pauli Award for Company of the Year. Educators are able to adopt, customize and sell digital textbooks and course materials on the Top Hat Marketplace. Teachers can also collaborate with one another to create and update teaching material. Currently, 90 percent of course materials in the Marketplace are free. Top Hat Test allows educators to create and administer tests and assessments. Top Hat (company) Top Hat is a Canadian educational software company with its headquarters in