This A-1 knit was issued to the United States Army Air Coprs ( USAAF ) during World War II. This mechanic Knit features soft fabric made of British Syrupshire wool yarn. The distinctive V-neck design around the neck is set shallow to allow for layering with a shirt. The knitting direction of the yoke, cuffs, and hem provide superior comfort by reducing stretchiness. Experience the quality and heritage of a WWII classic.