The best base layers for skiing and cold weather, based on years of testing

When you buy through our links, Business Insider may earn an affiliate commission. Learn moreHalfdays, SmartwoolWhen I moved from the East Coast to the Rocky Mountains years ago, I simply did not understand how to layer for warmth. I wore cotton long sleeve tees and was toasty when I stepped outside, but felt freezing once my body heat built up. Then I tried heavy wool base layers and long underwear, but those just made me overheat each time I'd pop inside a shop on a cold winter day.Eventually,