This is the lightweight jacket based on the K-1A flight suit worn by World War II Army Air Force pilots. The original was a full-length jumper worn by late-war aviators and into the 1950s. This jacket borrows only the top half of the K-1A for modern year-round wear, faithfully replicating the diagonal zippered equipment pockets on the upper chest, a feature still found on modern military flight suits. This jacket's sage-green exterior is an accurate detail that marked the newly named U.S. Air Force's transition from bulkier, fleece-lined leather models to streamlined nylon models in 1947 to accommodate pilots seated inside newer, smaller jet aircraft cockpits. Made by Cockpit, suppliers of outerwear to the USAF and Navy, it is lined with a nylon reproduction of a silk "escape" map of occupied Europe. With a knit ribbed collar, cuffs, and waistband with two lower slash pockets. Zippered front. Men's chest sizes M (40), L (42-44), XL (46), or XXL (48-50). (2 lbs.)