I really have no idea what it was made of. I thought it was from Northern Brewer. Could have been another that came into my possession along the way. All I know is that it was caught on my element and had a burned hole in it.
I had another of the same kind of bag melt. Could be cheap, could be a nylon-something else blend, I don't know. Regardless, that was the last of those bags and I have new ones that are supposed to be 100% nylon.