hose hat is whose. There are hard hats and soft hats, square hats and round hats. There are even very tall hats. Some workers wear special hats to help them do their jobs. Can you guess whose hat is whose? Learn all about the different hats worn by construction workers, police officers, firefighters, and more. An interactive, illustrated book with plenty of fun facts, Whose Hat Is This? by Sharon Katz Cooper provides a great introduction to some important jobs in the community in the form of an occupational guessing game.