The B-3 Flight Jacket was originally designed by the U.S. Army Air Force to keep high altitude bomber crews warm. Inspired by the British Irvin flight jacket, the B-3 is lined with sheepskin for extra warmth, and has a more oversized collar and a wider waist. The B-3 Bomber Jacket has since become an iconic style jacket, as seen on luminaries such as Marilyn Monroe, Steve McQueen, and a Kardashian or two.