The ETO jacket was widely used by the Army Air Force, which then developed the follow-on B-13 (Officer) and B-14 (Enlisted) jackets. This reproduction of the Officer jacket is made in the same dark OD 100% wool elastique. Though intended as flight gear, it was frequently worn as a dress jacket. Note that it has a standard military taper of 6 inches from chest size to waist size (i.e. size 48 jacket has a 42 inch waist).