This is a Minnesota Vikings Official NFL Vintage 80's Varsity Button Up Jacket. Made by Shain of Canada. There are no other tags on the jacket indicating fabric used or size. However I am guessing the exterior is nylon like the shiny jackets of that era. I think it is medium based on sizing with other medium jackets. Some wear on the front nylon, most around the one pocket (see pictures). Let m know if you have any questions.