This is my third Stormy, and I love them all. Will they keep you warm on the most bitter winter day? Probably not, if you’re outdoors for the day. But no hat is better for the shoulder seasons in Michigan when it could range from 30-50 all in the course of one afternoon. They perform very well in a cold light rain—the bill keeps it off your face and the wool keeps it out of your hair. I have thick hair and order one size up from what I measure according to the size chart and that makes for a perfect fit.