In concur, Korean. They sold those in the PX in Korea when I was there (91-92.) Not authorized for wear in uniform at least in a garrison environment, in the field you might be able to get away with it.
The local boot sellers offered an interesting variety of boots. You could get green "jungle" boots with speed laces and cap toes (like a jump boot), Boots with zippers, all black jungle boots (before the Army started issuing all-black jungle boots), different soles, etc. You could pretty much get whatever you wanted made to order. Of course, you may or may not be allowed to wear them in uniform but that's not the seller's problem.
The same sellers also sold "fake goretex" jackets. These were nylon jackets that were "cut" like an ECWCS goretex parka but made out of much cheaper material (at that time a goretex parka was around $160 at the Military Clothing Sales stores) and the Army as a whole hadn't started issuing the ECWCS uniforms to conventional units, only "special" units got them.
You could always spot the fake goretex because the BDU pattern material was made very cheaply and would fade badly after repeated washings and exposure to sunlight. I saw a few officers wear them around but most enlisted guys would not be allowed to wear one of them (not that most enlisted guys would buy one - the fake goretex seemed to be mostly bought by officers who wanted to look "different" but didn't want to spend the $$ for a real Goretex.)
By late 1991 the Army was issuing ECWCS parkas to everyone in Korea so the "fake goretex" market faded away.
Edited by Martinjmpr, 08 October 2019 - 01:19 PM.