So I stopped at my walmart today and found what appears to be some form of ripstop nylon. Unfortunately, it says "PROMO FABRIC" as the only source of ID on the bolt of fabric. How can I tell if its 1.1 or 1.9 or if its treated or if it actually is ripstop nylon? I went ahead and picked up 3 yards x 60" for a hammock sock because it feels and looks so similar to the material my pack is made of and i'm only out 3$ if not. lol.