When choosing wool blend coats, do you have a minimum percentage of wool you want in your coats? I'm curious because one of the coats I ordered apparently has more polyester than wool. I think it's because it's a black and white tweed. I don't know the percentage yet because they are supposed to show up tomorrow. I just don't know if for the price ($70) it'll be fine because of our relatively mild winters, or if I should hold out for one with more wool in it.