We tested the best men's base layers of 2025 with options for every budget. Top picks include Ibex, Patagonia, SmartWool, and ...

Thermal underwear can provide insulation beneath your clothing and keep you comfortably warm no matter how long you spend outdoors.

Long underwear — a.k.a. long johns, thermals, base layers, or whatever else you want to call the cozy, body-hugging tops and bottoms worn beneath looser clothes in cold weather — is my ...

Finally, consider the fit: if the base layer is too baggy then you’re going to be uncomfortable. I found the best fit was one where the thermals lay close to my skin. Indeed, some of the ...

The perfect ski outfit, in my humble opinion as a lifelong skier, is usually three or four layers: a tight, warm base layer; a mid layer fleece; a vest or a second fleece, dependi ...

Some base layers are stretchier than others – we found thermals with some stretch offered ... this is a clever bit of kit that you can pop over underwear or a vest top and layer under a thicker ...

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 ...

"Layering up" takes on a new meaning with these ultrathin base layers that can go incognito under your clothing. (Amazon) ...

While I spend most of my time indoors working, I also love to get outside in the elements, cross-country skiing and hiking ...

Fast forward to the 21st century, and the brand found its groove by focusing exclusively on thermal underwear and base layer products. Its waffle-knit thermals are the real deal, weighing in at ...