The History of Flight Jackets in WW2 and Beyond
The flight jacket is one of the few civilian garments whose design was driven entirely by the requirement to keep people alive. Every element of its construction (the leather, the fit, the collar, the zip) was the answer to a specific problem at altitude. This is why the garment has lasted.
The history of flight jackets from World War Two and beyond is the history of aviation technology forcing clothing design forward in ways that no fashion designer could have predicted or planned. The resulting garments are among the most functionally perfect pieces of clothing ever made, and their functional perfection is exactly why they became fashion objects. For more on the cultural history of the bomber, see streetwear meets heritage: modernising the classic bomber.
Before WW2: The Origins in Open Cockpit Aviation
Military aviation began in 1903. By 1917, pilots in the First World War were flying open-cockpit biplanes at altitudes where temperatures could fall to minus 20 degrees Celsius. Their only protection from the elements was their clothing. The first purpose-made flight jackets were developed during this period: leather, close-fitting, with a collar designed to stand up and protect the neck, and a closure that would not rattle open in the slipstream.
The design logic established in 1917 (leather outer, close fit, protective collar, secure closure) remained the foundational logic of military flight jacket design for the next 40 years. Every subsequent development was a refinement of this original solution, not a replacement of it.
The A-2: World War Two's Defining Flight Jacket
The A-2 jacket, standardised by the US Army Air Corps in 1931 and worn by American airmen throughout World War Two, is the leather jacket that most people picture when they think of a WW2 aviator. It was made from horsehide or goatskin leather, both tougher and more abrasion-resistant than modern fashion leathers, with a knit collar, cuffs, and waistband, a front zip, and two hip pockets.
The A-2 was not a bomber jacket in the silhouette sense that we understand today. It was a fitted flight jacket with a slightly longer body than the contemporary bomber. Its design was driven entirely by function: the leather resisted wind and abrasion, the close fit prevented the jacket from becoming a parachute if the cockpit was open, and the knit trim sealed the wrists and waist against cold air penetration.
American airmen personalised their A-2 jackets heavily, painting unit insignia, mission tallies, and personal imagery on the backs. This personalisation tradition is one of the most visible cultural legacies of WW2 flight jacket culture, and it directly influenced the custom and personalised leather jacket traditions of every subsequent decade.
The B-3: The Shearling Bomber for High Altitude
While A-2 crews flew at moderate altitudes in relatively contained cockpits, heavy bomber crews (those flying B-17 Flying Fortresses and B-24 Liberators on strategic bombing missions at 20,000 to 30,000 feet) faced temperatures that the A-2 could not address. At those altitudes, cockpit temperatures could reach minus 40 degrees Celsius. The B-3 was the solution: a sheepskin jacket with the fleece interior intact, providing insulation far beyond what any leather jacket could offer.
The B-3's bulk was its functional necessity and its visual signature: the rounded, substantial sheepskin silhouette that became the visual language of the high-altitude heavy bomber crew. Its civilian descendants, modern shearling bomber jackets, retain this visual logic while adapting the material for contemporary manufacture.
Over a century from the first open-cockpit leather flying jacket to the contemporary full-grain leather bomber — the same functional logic driving new design decisions across 100 years.
Korea, Vietnam, and the Transition to Nylon
The Korean War saw continued use of leather A-2 and B-15 jackets. The Vietnam War period coincided with the introduction and wide adoption of the nylon MA-1 and its successor the CWU-45/P. By the mid-1960s, leather had been almost entirely replaced in US military aviation by nylon — a material that was lighter, cheaper to produce, and adequate for the pressurised cockpit environments of jet-age aircraft where extreme altitude insulation was no longer the primary requirement.
The military's transition away from leather created the civilian leather flight jacket market. Surplus A-2 and other WW2 leather jackets flooded civilian markets at low prices through the 1950s and 1960s, making genuine military flight leather accessible to the general public and to the youth subcultures that would make the leather jacket a cultural symbol.
The Legacy: Why Flight Jacket Design Still Shapes Fashion
Every leather bomber jacket produced today carries the design logic of the WW2 flight jacket. The ribbed knit at the cuffs and hem: sealing wind at the wrists and waist, a solution to a 1930s altitude problem. The simple front zip rather than buttons: secure closure that would not vibrate open in the slipstream. The close-fitting silhouette: preventing the jacket from becoming a drag obstacle in an open cockpit.
These solutions are so effective that they have not been improved upon in 90 years of subsequent design. A contemporary full-grain leather bomber from Decrum uses the same fundamental construction logic as the A-2 jacket worn over Europe in 1943 — because that logic was correct, and correct design does not become obsolete.
The flight jacket is the clearest example in fashion history of a garment whose design was driven entirely by function and whose functional perfection created its aesthetic authority. Every design decision was an engineering solution. The garment became beautiful as a consequence of being correct, which is why no amount of deliberate fashion design has produced anything that replaces it.
