Thermal Underwear: Buying Guide and Best Choices
Thermal underwear is a must-have if you are doing any cold weather activity or live in a northern climate. The big question is: Which brand or specific underwear is best? We know cold weather, so we did a head-to-head test with our 5 favorite lines of thermal underwear: Filson, Smartwool, Patagonia, L.L. Bean, and Carhartt. …