Featured in this lot is this U.S. Air Force N-3B Snorkel Sub-Zero parka, circa 1950's to 1980's. The parka is Mil-Spec green and shows the size as large. US Air Force N-3B Snorkel Parka was developed in the USA during the early 1950s for military use. It was designed to protect flight crews from the most extreme and harsh cold weather. It was primarily issued to air crews assigned to troop transports, helicopters, and strategic bombers. The Valley Apparel N-3B Parka features a water-repellent Military Grade Nylon Flight Satin, warm polyester fiber interlining and a drawstring hood with faux coyote fur. The condition of this Mil-Spec Sub Zero parka is good, with no obvious signs of damage. The measurements of this Mil-Spec parka are 40" x 34".