This one of a kind vintage 90s PHS wing design tank top is made by Sommerfield, based in Portland, Oregon. As you can see, the tag has XXL written on it, but other than that there is no indication of size. We would actually categorize it as an XL. Please ask us for measurements if you are unsure about this one. There is no listing of materials, but it is very thin and light, and not cotton. This is truly awesome, and as always, we only have one!