The MA-1 bomber jacket (also known as the MA-1 flight jacket) was first developed in the mid-1950s.
The MA-1 was initially produced in midnight blue and sage green. Blue was the original color used by the military, but it was soon replaced by green. During the Korean War, (1950–1953) mixing flight clothing from multiple time periods and colors was not unusual. Presumably, the green was eventually adopted because it blended more easily with the environment should the pilot need camouflage protection on the ground. During the Vietnam War, there were variant commercial copies of MA-1 in camouflage pattern which were purchased by American servicemen. While no longer issued by the United States military, it remains popular among many United States-allied armed forces (e.g. Israel, Japan, South Korea, Philippines, Taiwan (ROC) and Thailand).