U.S. Navy Style · Modified G-1 Z2108M
Cockpit USA Modified G-1
Goatskin Flight Jacket · Removable Mouton Collar
₩1,236,000
Cockpit USA re-invented the G-1: the same seal-brown military-spec goatskin and "USN" wind flap, with a removable genuine mouton collar and hidden side-entry pockets — the practical answers to a strict mil-spec jacket. Made in the USA.
Fit — Slim · Sized to Military Spec
Cut slim to the military sizing standard. Cockpit USA recommends ordering one size larger for a looser fit.
U.S. Navy Style · Z2108M
Cockpit USA Modified G-1
₩1,236,000
Collar off, collar on.
Genuine mouton collar — fully removable, with a snap-down leather under-collar beneath.
Two-way pockets.
Traditional button-flap pockets plus hidden side-entry handwarmers — the modification the mil-spec never allowed.
Made in America.
Built in the USA by Cockpit USA — an official U.S. government supplier.
Removable genuine mouton collar · mil-spec goatskin
The G-1's materials. Your terms.
Seal-brown military-spec goatskin and real mouton fur — the collar now unsnaps for warmer days.
The Workshop · Since 1975
Re-invented by the G-1's own maker.
In Cockpit USA's words: 'Cockpit USA has re-invented the G-1 once again with a now removable genuine fur collar and side entry pockets.' Same workshop, same materials — one jacket answers to the spec, this one answers to you.
The Modified G-1, collar on
Fit
Slim. Sized to the military spec.
Cut slim to military sizing — Cockpit USA recommends one size up for a looser fit, and the tapered sleeves keep it tailored either way.
Measurements
The G-1 Family
Choose your G-1.
Modified G-1
The practical G-1
₩1,236,000
You’re looking at it
Before you fly.
How is this different from the Mil-Spec G-1?
Same goatskin, same USN wind flap — but the collar removes, side-entry handwarmer pockets are added, and the cut is slimmer. The Mil-Spec follows the specification exactly; the Modified adds what the spec never allowed.
Is the collar really removable?
Yes — genuine mouton fur, fully removable, with a finished leather under-collar and snap-down tabs beneath.
How does the sizing run?
Slim, sized to the military standard. Cockpit USA recommends ordering one size larger for a looser fit.
Does it have handwarmer pockets?
Yes — hidden side-entry pockets alongside the traditional button-flap pockets. Two-way entry.
Made in USA?
Yes — by Cockpit USA, an official U.S. government supplier.
More from the flight line.
Naval Aviation Heritage · Re-invented by Cockpit USA
One G-1 answers to the spec.
This one answers to you.
The military specification never allowed handwarmer pockets, and its mouton collar is sewn in for good. Cockpit USA — maker of the regulation G-1 — re-invented the jacket for daily wear: a removable genuine fur collar for warmer days, hidden side-entry pockets along the flap-pocket line, and gently tapered sleeves. Everything else stays true: mil-spec goatskin, the "USN" wind flap, the bi-swing back. Made in the USA.
Genuine mouton collar — removable, with leather under-collar beneath
The Material
Mil-spec goatskin.
Mouton on your terms.
The same seal-brown military-spec goatskin as the regulation G-1 — and the same genuine mouton fur. The difference: this collar unsnaps, revealing a finished leather under-collar with snap-down tabs.
Inside: nylon lining with an interior pocket, elastic knit waistband, and flared cuffs.
Construction
The spec, with permission slips.
Removable mouton collar
Genuine fur when it's cold. A clean leather under-collar with snap tabs when it's not.
Two-way pocket entry
Button-flap pockets in front, hidden side-entry handwarmers along the seam.
"USN" wind flap
The Navy's mark, perforated through the front fly panel — unchanged from the regulation jacket.
Bi-swing back + vented gussets
Full reach without ride-up; underarm gussets with vent holes move air.
Tapered sleeves
Gently tapered for a more tailored line than the standard G-1.
Knit waist and cuffs
Elastic knit waistband and flared cuffs, plus a hidden pencil pocket.
“Cockpit USA has re-invented the G-1 once again.”
Cockpit USA · G-1 with Removable Collar, Z2108M
The Workshop · Since 1975
Modified by the people
who build the original.
Cockpit USA builds the regulation mil-spec G-1 — and this is their own answer to its limits. Same American workshop, same military-spec materials, with the modifications made deliberately and disclosed plainly: the collar removes, the pockets warm your hands.
An official U.S. government supplier since the years after 1978, outfitting the U.S.A.F., Navy, Army, and NASA.
Cockpit USA label — collar snapped in place
The Modified G-1 in the field
The Details
One jacket. Two configurations.
Genuine mouton collar — snapped in
The same jacket, collar off — leather under-collar showing
Fit
Slim.
Sized to the military spec.
Cockpit USA cuts the Modified G-1 slim, to military sizing — and recommends ordering one size larger for a looser fit. The tapered sleeves keep the line tailored either way.
Fit — Slim · Sized to Military Spec
Between sizes, layering, or prefer room? Take the next size up, per Cockpit USA's own guidance.
Full chart with all ten sizes (38–56) in the Size Guide. Measurements taken flat; chest is armpit to armpit. Long sizes sold separately at Cockpit USA.
The G-1 Family
Three G-1s. One lineage.
What Customers Say
Questions
Before you fly.
How is this different from the Mil-Spec G-1?
Same seal-brown mil-spec goatskin, same "USN" wind flap and bi-swing back. The differences are deliberate: the mouton collar removes (the Mil-Spec's is fixed), hidden side-entry handwarmer pockets are added (the specification never had them), the sleeves are gently tapered, and the cut is slimmer.
Is the collar really removable?
Yes — genuine mouton fur that unsnaps completely, with a finished leather under-collar and snap-down tabs beneath. Two jackets in one.
Is this historically accurate?
It's built on the G-1's pattern and materials by the maker of the regulation version — with the modifications openly disclosed. If you want the strict specification, that's the G-1 Mil-Spec.
How does the sizing run?
Slim, sized to the military standard. Cockpit USA recommends ordering one size larger for a looser fit. Full chart in the Size Guide.
Made in USA?
Yes — by Cockpit USA, an official U.S. government supplier.
Is this the Top Gun jacket?
No — the G-1 family includes the licensed Reproduction Top Gun G-1 with its 17 patches. This is the clean, practical daily-wear G-1.
