Favored by bomber crews of aircraft such as the B17s and B24s during WWll, the B3 Bomber Jacket was brought into service around 1934. It was specifically made for open cockpit and high altitude flying, and the B3 Bomber Jacket did its job admirably. This heavyweight jacket was the original leather quotBomber Jacketquot.Using American Shearling, our B3 jacket has leather welted seams, a heavy duty front zipper over a wind flap, custom authentic metal buckles and nonstandard comfortable, and side entry hand warmer pockets first added in 1978. Dont settle for imported copies. This B3 Bomber Jacket is proudly made in the U.S.A. Available in regular and long sizes. This Made in the USA B3 Bomber Jacket features Amazingly soft and supple genuine sheepskin with a classic, aged look Deeppile natural American shearling along the body, sleeves, and collar. Leather welted seams Heavy duty front zipper over a wind flap Custom authentic metal buckles Comfortable side entry hand warmer pockets Proudly made in the U.S.A. since 1975.SizesThis full cat jacket runs true to size no need to upsize for more room. The sizes are standard mens coat sizes. Generally speaking, Small is 3840, Medium is 4042, Large is 4244, and XL is 4648, and XXL is 5052. Please note that sizes 48 and higher are slightly more expensive price shown in cart.Jacket Size ChartFor an accurate measurement, youll need a flexible tape measure inches and someone to help you place and read the measuring tape. Measure the biggest circumference around the chest and keep the measuring tape horizontal, wrap around the biggest girth of the chest, keeping the measuring tape up and close to the arm pits.