A leather jacket is a jacket-length coat that is usually worn on top of other apparel or item of clothing, and made from the tanned hide of various animals. The leather material is typically dyed black, or various shades of brown, but a wide range of colors is possible. Leather jackets can be designed for many purposes, and specific styles have been associated with subcultures such as greasers, rednecks, cowboys, hillbillies, motorcyclists, military aviators, police, and music subcultures (punks, goths, metalheads, rivetheads), who have worn the garment for protective or fashionable reasons, and occasionally to create a potentially intimidating appearance.
Most modern leather jackets are produced in Pakistan, India, Canada, Mexico and the United States, using hides left over from the . Fabrics simulating leather such as polyurethane or PVC are used as alternatives to authentic animal hide leather depending on the needs of the wearer such as those pursuing vegan lifestyles or for economic reasons as synthetic fibers tend to be less costly than authentic leather.
In the early 1900s, brown leather flight jackets were worn by aviators and members of the military. During the Second World War, they became known as "bomber jackets" and were heavily insulated and prized for their warmth. The jacket was often part of an overall uniform ensemble meant to protect bomber pilots from exposure to the extreme climate conditions found at high altitude, and sometimes incorporated sheepskin, using the intact fleece on the inside for warmth.