G-1 Flight Jacket Guide: Navy History, Details and Fit
The G-1 flight jacket is the US Navy's leather flight jacket, and versions of it have been issued to naval aviators for more than 80 years. At first glance it looks like a bomber, but its mouton collar, pleated back and pocket layout are all its own. Here is its history, the details that define it and how to wear one today.
Quick answer: The G-1 flight jacket is the US Navy's leather flight jacket, issued to aviators in the Navy, Marine Corps and Coast Guard. It is defined by a mouton collar, a bi-swing back with pleats behind the shoulders, underarm gussets, knit cuffs and waistband, and two flapped patch pockets. Originals were made from brown goatskin.
What is a G-1 flight jacket?
The G-1 is an intermediate-weight flight jacket: warmer than a cotton layer, lighter than the sheepskin jackets made for high-altitude bomber crews. It was designed for naval aviators who needed to move freely in a cockpit and stay warm in cold, damp sea air.
Unlike most military flight jackets, the G-1 never really retired. It is still part of naval aviation uniform today, made to an updated military specification, more than 80 years after the first version was drawn up.
G-1 history: from the M-422 to today
The Navy's leather flight jacket took shape in the late 1930s. In 1940 it was specified as the M-422, in chocolate-brown goatskin with a mouton collar, a bi-swing back and a rayon lining, and it was revised later that year as the M-422A.
During World War II the Army and Navy moved to shared designations, and the jacket became the AN-J-3 in 1943, followed quickly by the AN-J-3A. After the war the name G-1 appeared on the label, and since 1951 the jacket has been made under a military specification that is still revised today.
Issue was briefly halted at the end of the 1970s as a cost-saving measure, then restored by the Secretary of the Navy in 1981. Today it goes to officers and enlisted aircrew on flying status, which is why so many wearers regard it as something earned.
The details that define a G-1
A true G-1 pattern follows a short list of features. If you're shopping for a G-1 style jacket, these are the details to look for.
- Mouton collar. Mouton is sheepskin with the wool sheared short and processed into a dense, smooth pile, traditionally dark brown. Turned up, it shields your neck from the wind.
- Bi-swing back. Pleats behind each shoulder open when you reach forward, so the jacket doesn't pull across your back.
- Underarm gussets. Extra panels under the arms let you raise them without lifting the whole jacket.
- Knit cuffs and waistband. Wool knit trims seal out drafts at the wrists and hips.
- Patch pockets with button flaps. Two large lower pockets, plus an inside pocket for maps or papers.
- Storm flap. A strip behind the zip keeps wind from blowing through the teeth.
- Name tag. Aviators traditionally wear a leather name tag on the left chest, with squadron patches added over time.
The original leather was goatskin, chosen for its light weight, strength and pebbly grain. Civilian versions now come in a wider range of leathers. Our goatskin leather guide explains why it suits flight jackets so well.
G-1 vs A-2: what's the difference?
The G-1 and the A-2 are the two classic American leather flight jackets, and they are easy to confuse. The quickest tells are the collar and the back.
| G-1 | A-2 | |
|---|---|---|
| Service | US Navy, Marine Corps and Coast Guard | US Army Air Corps and Army Air Forces |
| Collar | Mouton collar | Leather shirt collar with snap-down points |
| Back | Bi-swing pleats | Plain back |
| Shoulders | No epaulets | Leather epaulets |
| Pockets | Patch pockets with button flaps | Patch pockets with snap flaps |
| Original leather | Goatskin | Horsehide, later goatskin |
Both have knit cuffs and waistbands and a center zip. For the Army side of the story, read our A-2 vs B-3 flight jacket comparison.
Choosing a G-1 style jacket today
Our Men's Black Leather G-1 Bomber Jacket with Sheepskin Collar keeps the G-1 outline but swaps the traditional brown for black, which looks sharper and less military with city clothes. If you prefer the heritage brown look, the distressed brown flight jacket with a shearling collar has the same collar-up character, and a lightweight A-2 suits milder weather.
Men's Black Leather G-1 Bomber Jacket with Sheepskin Collar
Men's Distressed Brown Leather Flight Jacket with Shearling Collar
Men's Distressed Brown Lightweight Cowhide A-2 Flight Jacket
When you compare jackets, check the collar first. A sheepskin collar is warm and naturally soft, and our sheepskin leather guide explains how it is made. Then look at the pockets, the knit and the back, since pleats or gussets are what give a flight jacket its range of movement.
How a G-1 should fit
Flight jackets are cut with more room than a biker because they were designed to go over uniforms and sweaters. A good G-1 fit is easy through the body but still neat.
- The knit waistband should sit at your belt, with the leather bloused just slightly above it.
- The shoulder seam should rest at your shoulder edge. The pleated back takes care of reach, so you don't need to size up for movement.
- With your arms stretched forward, as if holding a steering wheel, the cuffs should still cover your wrists.
- You should be able to zip it over a sweater without strain.
Our leather jacket fit guide explains each checkpoint, and the size guide shows how to measure. If standard sizes don't suit your build, choose "Customise Size (made to measure)" on the product page and email info@whiteburaq.com with your order number and your chest, shoulders, sleeve length, waist, hips and jacket length.
Made-to-measure jackets ship within 3–7 business days, then express delivery takes 3–5 business days in the US and 5–8 elsewhere. Since each one is cut to order, made-to-measure pieces can't be returned. Our made-to-measure page has the full steps.
How to wear a G-1 flight jacket
The G-1 is a practical, outdoorsy jacket, and it looks best with clothes in the same spirit.
- Weekend: a gray sweatshirt or white tee, mid-blue jeans and leather boots or suede desert boots.
- Heritage: a chambray or oxford shirt, khaki chinos and brown boots. It nods to the jacket's naval roots without looking like a uniform.
- Cold weather: a shawl-collar cardigan or roll-neck sweater underneath, with the collar turned up.
- City: a black G-1 over a black roll-neck and charcoal trousers, for a darker, sharper take.
A note on respect: official wings, squadron insignia and rank belong to those who earned them. A plain jacket, or one with a simple name tag, looks sharper anyway.
Caring for the leather and collar
Treat the leather like any quality jacket: wipe it with a damp cloth, let it dry naturally and condition it once or twice a year, keeping conditioner off the collar. Brush a sheepskin or mouton collar gently to lift the pile, and if it gets wet, blot it and let it air dry away from heat.
Hang the jacket on a wide hanger with the collar folded down flat so it keeps its shape. Cared for this way, a genuine leather flight jacket can be worn for many years.
FAQ
Who can wear a G-1 jacket?
Anyone can buy and wear a civilian G-1 style jacket. Official issue G-1s go to Navy, Marine Corps and Coast Guard aviation personnel on flying status.
What is a mouton collar?
It is sheepskin with the wool sheared short and processed into a smooth, dense pile. It is warm, soft against the neck and traditionally dark brown.
Is a G-1 the same as a bomber jacket?
It belongs to the same family, with knit cuffs, a knit waistband and a center zip. The mouton collar, bi-swing back and flapped patch pockets make it a distinct Navy pattern.
Is the G-1 still issued today?
Yes. It is still issued to naval aviation personnel, made to a military specification that has been updated many times since 1951.
If the mix of heritage and practicality appeals to you, browse our bomber and flight jackets, then use the size guide or choose made to measure for a G-1 flight jacket cut to your numbers.