U.S. G.I. Extreme Cold Weather Parka, N-3B,N-3B Military Snorkel Extreme Cold Weather Parka,USAF N-3B Heavy Jacket 1963 Mint Condition.,Vtg 60's US Air Force USAF Fur Hood Snorkel Parka Jacket N-3B Size Small Made in U.S.A. - Etsy,GEN. USAF ISSUE TYPE N-3B EXTREME COLD WEATHER PARKA - Medium | eBay