The Patagonia Capilene Midweight Crew is an excellent medium-warmth baselayer for wicking sweat and staying toasty during high-output activities like skiing, snowboarding, and adventures in cold weather. It's so comfortable that you might find yourself wearing it as pajamas and around town. HeiQ Fresh technology means you have some protection against the inevitable odors that start to build up in your layers after spending all day working up a sweat.