Whether you’re hiking icy trails or hitting the slopes this winter, high-quality thermal underwear is a must. The best thermal underwear won’t just keep you warm and cozy, either—it’ll also help you ...

A quality pair of thermal underwear is one of the best investments you can make. These performance layers maximize warmth, wick away sweat, and disappear under everything from puffer jackets to ...

Whether you’re into snow sports or simply want to prepare for winter weather, base layers can help insulate heat while wicking sweat away from your skin. Those base layers can include thermal ...

The best kept secret about my winter wardrobe — until now, I guess – is that half of it is invisible. Between December and March, I rarely leave the house without a base layer (or thermal underwear, ...

Thermal underwear is known by many names — long johns, base layers, long underwear, skivvies, or even britches (for my Southern friends). No matter what you call them, they are a staple for anyone ...

Our product picks are editor-tested, expert-approved. We may earn a commission through links on our site. Why Trust Us? LET'S BE FRANK: Thermal underwear is arguably the least sexy type of underwear ...

New York Post may be compensated and/or receive an affiliate commission if you click or buy through our links. Featured pricing is subject to change. As temperatures drop to near-freezing lows, we’re ...

During winter, it's imperative that you have a pair of thermal underwear in your repertoire. Whether heading to work or ...

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Trey French Trey French is ...

Long before the days of electric blankets (or electricity, period), the best thermal underwear was the only thing separating you from frostbite in the dead of winter. These days, the stakes might be a ...