The wigs for Bozo were originally manufactured through the Hollywood firm Emil Corsillo Inc. The company designed and manufactured toupees and wigs for the entertainment industry. Bozo's headpiece was made from yak hair, which was adhered to a canvas base with a starched burlap interior foundation. The hair was styled and formed, then sprayed with a heavy coat of lacquer to keep its form. From time to time, the headpiece needed freshening and was sent to the Hollywood factory for a quick refurbishing. The canvas top would slide over the actor's forehead. With the exception of the Bozo wigs for WGN-TV Chicago, the eyebrows were permanently painted on the headpiece.