Best Underwear For Winter 2024. Check out the best lightweight base layers, budget picks, and the best thermal underwear for everyday wear to find the perfect long underwear for your needs. With winter just around the corner, make sure you prepare for the cold months by getting the right underwear.

We found the best base layers and thermal underwear for women of 2024, including top picks from smartwool, icebreaker, stio, and more. We’ve been testing them for over a decade and showcase 16 of the best options in this.