The Cooper G-1 flight jacket is a type of G-1 flight jacket that was issued to U.S. Navy pilots from the 1930s during World War II. The G-1 flight jacket was developed as a counterpart to the Army's A-2 jacket. This jacket is made of goatskin and features mouton fur on the collar. It has action pleats on the back to enhance mobility, a design that takes into consideration the pilot's ease of movement.