The Irvin Flying Jacket is one of the most iconic pieces of military aviation clothing ever designed. Created by American aviator and entrepreneur Leslie Irvin (the man who also invented the first ripcord parachute system), it became the standard-issue cold-weather gear for Royal Air Force (RAF) crews during World War II. Because bombers like the Lancaster and Halifax were unpressurized and unheated, temperatures at 20,000 feet could drop to -40°C. The Irvin was the primary defense against frostbite. Made from heavyweight sheepskin with the wool turned inwards. The exterior was coated with a dark brown "polyacrylate" finish to provide water and oil resistance. Features an oversized, wide collar with a strap and buckle. This allowed the pilot to flip the collar up to protect the ears and neck. A distinctive leather belt with a brass buckle was sewn into the waist to prevent drafts from entering the jacket. Authentic WWII with Dot branded brass zippers. Features "Armpit" air holes, small metal grommets under the arms for ventilation. Circa early 1930s. The label has either been removed or wore off over time but the jacket bears all the characteristics of the original RAF Irvin flying jacket. Over 80 years, the polyacrylate coating has developed a "crazed" or cracked appearance, wool is brittle and a small tear on the front chest side. A fantastic collectible for militaria collectors.