We see you, winter. Your snow-capped mountains and powdery slopes. Your toddy-adjacent ice skating rinks and s’mores sessions around the firepit. 

Yep, you’ve definitely got a way about you. But it turns out… you’re also just too damned cold. 

Unless, of course, you’ve got yourself a thermal shirt and a proper pair of cold-slaying men’s thermal underwear. A thoughtfully constructed pair of long underwear can mean the difference between actually enjoying your alfresco endeavors and retiring early to the nearest indoor heat source with your frostbitten tail between your legs. 

And to that end, we’ve taken the liberty of rounding up the best thermal underwear for men. Partly so you don’t have to, but mostly because your winter dermis deserves better than naked flannel and base-layer-less denim. 

Let’s get toasty…

The Best Thermal Underwear For Men

Best Overall: Patagonia Men’s Capilene Air Bottoms 

Household names don’t typically become so by accident. Patagonia has earned its stripes and the respect of millions by not only being stewards of the environment but by putting quality on a pedestal. 

The Capilene Air Bottoms (great to pair with the Capilene Air Crew) are no exception when it comes to the best thermal underwear for men. A nearly equal-parts blend of merino wool and recycled polyester do their part to keep odor and moisture at bay, making this dream team ideal for outdoor adventurers and anyone who regularly hits the slopes. 

But perhaps the coolest part of the Capilene line is its 3-D knit structure, which dares you to find at least one stitched seam in any of its garments. 

Protip: you won’t. 

SEE IT

Best Merino Wool Option: Icebreaker 200 Zone Seamless Thermal Leggings

Three words: 100% merino wool. 

Or is that three numbers, one symbol, and two words? Doesn’t matter. What matters is that this duo’s merino fibers want nothing more than for you to conquer that snowy mountain, fish that frozen lake, or roast that unroasted marshmallow as comfortably as possible.