Fender tweed is a generic name used for the guitar amplifiers made by the American company Fender between 1948 and 1960. The amplifiers are named for the cloth covering, which consists of varnished cotton twill, incorrectly called tweed because of its feel and appearance. They are praised for their sound, their circuitry being considered "hallowed ground". Fender generally stopped using the twill covering in 1960, exceptions being the Harvard which continued to be covered in twill until 1963, and the Champ until 1964.