The colvinex flight suit was a one piece goatskin coverall electrically heated flight suit. Great for cold weather flying in WWII and Korea, not so great as surplus. Not a lot of call for the average joe for something as specialized as these. So out come the electrical coils, and out come the scissors, needle and thread. I’ve run across quite a few examples of these that were cut down post war for casual or motorcycle use, and each does it a bit differently.