Alpha Industries G-1 Leather Jacket 100% Leather The U.S. Navy started making the G-1 leather jacket (originally known as the M-445 flight jacket) during the Second World War. The jacket was form-fitted with a longer waist webbing at the bottom, a bi-swing back for easier arm movement and a Mouton collar. The G-1 used button closures on the front pockets. It was made until 1978 when Congress cancelled it due to its popularity and lack of supply. It was produced again during Desert Storm and is still issued today. Alpha is proud to make th...