At the top of my shopping list is this thin thermal top from Amazon-favorite brand Zesica. My biggest struggle is finding basics that are fashionable yet functional and this top is both.

The set includes a top and bottom, offering full coverage and flexibility for daily activities. Lux Cottswool Women's Thermal Set is crafted to provide exceptional warmth and comfort. The upper ...

We tested the best thermal underwear for women from top brands like Ibex, Smartwool, Patagonia, Outdoor Research, Black Diamond, Montbell, Decathlon, Uniqlo, and Kari Traa to see which were best ...

Sarah F $30 at Amazon These bestselling long johns are a set comprised of a separate thermal long-sleeved shirt and leggings. There's a men's version by Thermajohn and a women's version by Thermajane.