Ya the problem with those vintage concert t-shirts is that they were VERY popular back in the day and people wore them a LOT. They were wardrobe staples. So most of them ARE thin.
I have The Mask too. It's a pretty shirt. I hardly wear it for the same reason, THIN. Well, I hardly wear my newer tshirts either cuz folks just don't wear them all the time like they used to.
Laura