I wore one a fair amount in the AF '72-'76.
Rugged, waist can be cinched in to discourage drafts from underneath, collar hood's thin but usable.
Good cool to cold weather jacket.
I outgrew my issued one long ago, still have it.
Bought a bigger one about 20-something years back, used to wear it all the time & wear it now on the UTV and shooting in the winter. Holding up well after a lot of use.
Surprisingly warm if you install the button in liner.
Don't know how well the current imports are made.
Denis