I love this hat.  After losing my "official" Army/Navy store cap I struggled to find a new one that was thick enough to keep my head warm, and deep enough to cover the big ole thing.  I have found the solution.  The Wigwam Mills hat is an excellent choice; thick enough so that I never feel wind through the hat, and deep enough for at least a 2 inch fold over.  I noticed that some folks said it was a bit tight.  It does have a snug fit, but I don't find it to be uncomfortable.