This is an original WWII U.S. Army Air Force AN-H-15 summer flying helmet. These were introduced on April 23, 1943 as the standard summer or lightweight flying helmet for both the Army Air Force and Navy. It was the first flying helmet designed under the joint Army/Navy procurement program, officially replacing the Type A-9. This particular example was manufactured by Bates Shoe Co., and is a size medium. It is in good condition, displaying nicely on a standard display head (not included).