I've had the Nut Beret for almost four years now. It's kept my head warm everywhere from Colorado foothill camping trips to above tree line after dark in the dead of winter on a few hut trips. When it's really cold and windy you can pull the Gore Windstopper ear flap down for extra protection. You can't beat this hat. Plus it's just plain cool. I always get a ton of compliments on it. Thanks Mountain Hardware!