This authentic B-3 jacket became the military-issued cold-weather flight jacket in 1934, and it is still the warmest and most insulating bomber jacket made. Aviators in WWII bombers came to rely on their B-3 jackets as they often flew their missions over Europe in unpressurized cabins, where air temperatures could drop to more than 60 degrees below zero. Our B-3 is traditionally made from genuine sheepskin leather with a classic, aged look and deep-pile natural shearling along the body, sleeves, and collar. With double straps under the collar and straps at the waist that cinch to adjust the fit and keep out wind. Traditional leather welted seams and side-entry pockets are authentic details from the original. Made in U.S.A.