This is the shearling leather jacket that kept B-17 and B-24 flight crews warm during missions at high altitudes above the Atlantic during the Second World War. Made from 100% American lamb shearling leather, a material used for centuries for its natural insulative properties, the jacket is hand-tailored from sheepskin that is hand-cut and sewn piece-by-piece. Made by Cockpit USA, suppliers to the U.S. Air Force and Navy, this replica is faithful to the original AN-J-4 bomber jacket, complete with the same knit cuffs inside the sleeves, exterior patch pockets, wool lining, and plush collar that distinguished the original, while the addition of side entry pockets ensure practical contemporary wear. Made in the U.S. For a more generous fit, p lease order one size up. Specify Men's sizes M (42), L (44), XL (46-48), XXL (50).