Let's discuss some facts about leather jackets. Did you know how and where leather attires originated? In the early 1900s, when World War began, some military officers started to wear pure sheepskin outfits layered with shearling inner, and tailored in such a way that was able to protect them from deadly cold freezes. Later on, that specific outerwear became famous with the name of B3 Bomber Jackets. Afterward, some amazing designs also came in the market for air force pilots which are known as aviators. Bombers have many different varieties and designs. All of them have unique design codes.