During World War II and the Korean War, ribbons were also authorized with this uniform, making it a "de facto" "service uniform" or "liberty uniform," authorized for wear off base. But by the early 1960s, it had become limited to that of a "working uniform" for use on base or aboard ship only. It was infrequently worn, primarily due its expense and its 100% wool fabric that typically made it unsuitable outside of the winter months; in the working environments where AWGs were authorized, aviators typically found working khakis or flight suits more convenient.