The B-15 jacket was first introduced in 1944 to replace the B-10. It was used throughout the late 40's by the U.S. Air Force pilots and air crews. Designed for cold temperatures, the jacket had a Mouton fur collar and 100% wool knit waistband and cuffs. It also featured a tab to hold the pilot's oxygen mask as well as a second one to keep the headset wires in place. It went through many revisions including one that started using nylon. Alpha started making reproductions of the B-15 bombers in 1993 and today produce them to the B-15D specifications including the nylon, tabs and Mouton collar.