A Complete Timeline of Military Flight and Bomber Jacket History
The bomber and flight jacket was born out of necessity ā military aviators needed lightweight outerwear that could withstand freezing, unpressurized cockpits without restricting movement. Over two decades of testing, redesigns, and real combat use, that need produced a whole family of jackets, each with its own materials, construction, and story. What started as strictly functional flight gear for military personnel has since become one of the most recognized casual wardrobe staples in the world.
At Sheepskin Leathers, we've put together a complete timeline of the most significant flight jackets ever produced ā from the very first A-1 in 1927 to the refined G-1 of 1947 ā along with what made each one unique.
A-1 Jacket (1927)
The A-1 was the first mass-produced flight jacket, manufactured in 1927 by several different makers. Because multiple companies built it to slightly different specs, product details varied ā but the essential features stayed consistent across every version. Simple by today's standards, its value and prestige at the time were enormous, and it remained in informal use even fourteen years after the more advanced A-2 bomber jacket replaced it. Official production of the A-1 ended in 1931.
A-2 Jacket (1940)
Early designs for the A-2 arrived in the early 1930s as a direct evolution of the A-1, and it was built mainly from horsehide or goatskin. Where the A-1 used buttons, the A-2 introduced heavy-duty zippers, knit cuffs, and a knit waistband ā small changes that gave it a noticeably more refined, sturdy feel. The A-2 stayed in regular use until 1943, and its influence on later flight jacket design is still visible today.
B-3 Jacket (1934)
The B-3 jacket was designed specifically for bomber crews flying at extreme altitude. Built from a combination of sheepskin and thick natural sheep fur, it was engineered to keep aircrew warm at altitudes up to 25,000 feet ā a reputation for exceptional warmth it still holds today. Each jacket had two leather straps to close the open collar, and unlike most other flight jackets of the period, the B-3 skipped the knit waistband entirely for a looser, warmer fit.
D-1 Jacket (1937)
The D-1 was originally built for ground personnel who worked in brutal weather but weren't flying themselves. Its design was simple, prioritizing ease of movement while still offering real protection from the cold. Pilots eventually adopted it too, often wearing it alongside the A-2 for extra warmth ā turning what started as ground-crew gear into a genuinely useful piece of flight equipment.
B-6 Jacket (1939)
Introduced in 1939 as an improved, noticeably lighter alternative to the B-3, the B-6 arrived just as aircraft cockpits were becoming more enclosed and better insulated. Fighters like the P-38 still lacked proper heating, which kept demand for warm flight gear high even as designs got lighter ā the B-6 struck that balance between warmth and reduced bulk.
B-7 Jacket (1941)
Also known as the B-7 arctic parka, this three-quarter length jacket was produced between 1941 and 1942 for both flight crews and ground personnel working in extreme, undeveloped cold-weather regions. It was built almost entirely from shearling, with the hood lined in coyote fur for extra protection. High production costs during wartime meant the B-7 couldn't be manufactured at scale for long, making surviving originals genuinely rare today.
M-422 and M-422A Jacket (1941)
The M-422 was standardized by the US Navy's Bureau of Aeronautics, with the updated M-422A officially recognized on October 1st, 1941 ā its main change being an added pencil slot on the left chest pocket. In 1941, American volunteer pilots flying the P-40 for the Chinese government against Japanese forces were issued M-422A jackets, cementing its place in early WWII aviation history.
G-1 Jacket (1947)
The G-1 is a direct evolution of the M-422A, refined through years of testing and small standardization updates. Even in modern production, it still holds onto the same core materials that made the original special ā goatskin leather, mouton sheepskin, and a wool-knit waist and cuffs.
M-422A vs. G-1: What's the Real Difference?
At first glance, the M-422A and G-1 look nearly identical ā and that's because the G-1 is really an evolution of the same jacket rather than a redesign from scratch. The M-422A was standardized by the US Navy's Bureau of Aeronautics on October 1st, 1941. In 1947, that same core pattern, with a handful of small updates, was officially re-designated as the G-1.
Both jackets share the same bi-swing back, vegetable-tanned goatskin, and mouton fur collar, and patterns did vary somewhat maker to maker since the US Navy specification left room for interpretation. Generally, M-422A jackets ran with a slightly fuller, more relaxed cut and a longer body, while later G-1s ā like the well-known 55J14 ā trimmed the torso and widened the shoulders for a sharper fit.
A few other details separate the two: the G-1's collar became slightly smaller and more blunt, its pocket flaps simplified, and most M-422A jackets used a salmon-red rayon lining where most G-1s switched to brown. Whichever version you're drawn to, both carry the same lineage ā built tough, tested in real combat, and made to be worn for a lifetime.
B-10 Jacket (1943)
Produced from 1943 using cloth rather than leather, the B-10 stood out with a collar and lining made from alpaca fur ā a more elegant-looking jacket than its predecessors, though it never quite matched the warmth of the earlier sheepskin models. Its pocket styling and clean zip closure without wind flaps closely resembled the later G-1.
B-15 Jacket (1944)
Standardized on April 7th, 1944, the B-15 was developed as an alternative to sheepskin flight suits, blending a cotton-rayon shell with some nylon components. It kept a few of the animal-based materials found in earlier models but introduced one detail that's stuck around ever since ā a dedicated pen pocket on the upper left arm.
Final Thoughts
From the simple A-1 of 1927 to the refined G-1 of 1947, each of these jackets tells part of the same story ā practical military gear shaped by real combat conditions, eventually becoming some of the most enduring designs in menswear. Two decades of trial, error, and battlefield feedback produced silhouettes that still influence how flight and bomber jackets are made today.
If you want to own a piece of that legacy, explore our full range of flight and bomber jackets, crafted from genuine leather and shearling with the same spirit that defined the originals.