Keep Warm This Winter With the 13 Best Pairs of Thermal Underwear for Men

best thermal underwear
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You may have heard at one point or another that winter is coming. And as much as we despise colder temperatures, the frigid season is just as inevitable as getting old or the arrival of the Starks. So, it only makes sense to start preparing for the uncomfortable, sub-freezing temperatures to come.

When you put your cold-weather clothing arsenal together, one item not to forget is a handy set of thermal underwear. These effective body-warming pants are meant to layer under your existing clothing. They add another bit of warmth to your body while also actively working to move sweat away from your skin and preventing you from overheating, even when you’re active or step back inside.

Whether you’re skiing down a slope, on your daily commute to work or wearing long underwear to fight freezing temps during a particularly cold overnight camping trip, thermal underwear is a not-so-secret yet super effective weapon against the winter elements.

Below, we’ve put together a list of the best thermal underwear for men on the market to ensure you’ll stay warm this winter time — no matter what.

1. UNIQLO Men’s Heattech Extra Warm Long Johns


If you know things are going to get really, really cold and you want to prioritize staying warm over everything else, try these Men’s Heattech Extra Warm Long Johns. They are advertised as being one-and-a-half times warmer than Heattech’s regular pants, ensuring at least your legs will stay warm in the coldest of conditions. For comfort, these long johns feature stretchy, shape-retaining material as well as soft back yarns. In addition, they’re bio-warming, moisturizing and self deodorizing.

best mens thermal underwear uniqlo Image courtesy of UNIQLO


2. Duofold Thermal Underwear


At a great entry level price, this set of thermal underwear from Duofold is a solid option for those who want to test and see if long underwear is for them. Made by Champion, they are rough and tough enough to handle most cold climates by combining two different fabrics into a material that feels like one. Luxury and comfort at an affordable price? Count us in.

duofold thermal underwear Image courtesy of Amazon


3. Hanes Men’s Red Label X-Temp Thermal Pant


One thing that many thermal pant wearers often complain about is comfort. Obviously, adding a layer under your normal layers can cause a problem if the extra layer doesn’t sit flush against your skin. The Hanes Men’s Red Label X-Temp Thermal Pant is a great answer to this problem as these long underwear sport no-rub seams with comfortable rib-knit cuffs to minimize friction and unwanted catching. They are also constructed from a cotton and polyester mix to further add comfort.

best mens thermal underwear hanes Image courtesy of Amazon


4. Wolverine Men’s Tech Grid Base Layer Pant


Another potential problem caused by adding extra layers is excess sweating. If you think this is a problem you’ll encounter, consider the Wolverine Men’s Tech Grid Performance Baselayer Pant. These long underwear sport advanced moisture-wicking technology to keep you comfortable, even when things get a little toasty in there. They are constructed from a polyester and cotton mix and feature an elastic waistband and reinforced seams to provide a secure fit.

best mens thermal underwear wolverine Image courtesy of Amazon


5. Terramar Military Fleece Thermal Underwear


If you want a pair of thermal underwear that’s really, really going to keep you warm, we’d recommend this fleece (!) lined version from Terramar. While it’s not as great as other options when it comes to regulating body temperatures, that trade-off comes at the cost of providing extreme warmth in the most dire of situations (hence why it was originally created with military personnel in mind). The exterior is lined with a smooth face in order to make sure it doesn’t move around too much when placed underneath a pair of pants.

terramar fleece thermal underwear Image courtesy of Amazon


6. 2(X)IST Cotton Long Underwear


2(X)IST Cotton Long Underwear is a great choice for anyone worried about skin sensitivity issues. This pair of long underwear boasts a 100% cotton construction for a pleasant feel against your skin which will keep you warm and comfortable in cold weather. These high-quality pants can also be machine washed and tumble dried for ease of care. In addition, they’re available in a range of colors, so you can match your underwear to the rest of your winter outfit.

best mens thermal underwear 2xist Image courtesy of Nordstrom


7. Nike Training Long Underwear


If you’re the kind of person that wants a pair of thermal underwear for exercising in, this particular version of Nike’s athletic long underwear is fantastic option. Thin and lightweight without feeling like you’ll rip them apart, they do a great job of replacing a standard compression short while hugging and supporting your legs. They’ll also do a fantastic job of wicking away moisture to keep you cool, even when you’re hot, so don’t worry about getting too warm while you’re hitting some HIIT training on the treadmill or at a workout class.

best mens thermal underwear nike Image courtesy of Amazon


8. Saxx Underwear Men’s Kinetic Long John


Let’s put this simply. If you’re a guy who often experiences more-than-average chafing ‘down there,’ adding an extra layer to your setup may only increase your levels of discomfort. However, the Saxx Underwear Thermoflyte Tight Fly has got you covered with a patented BallPark Pouch which delivers friction-free support. The 3D hammock provides the support you need with none of the unwanted friction. The pants also include flat-out seams to further prevent chafing during use.

best mens thermal underwear saxx Image courtesy of Amazon


9. MERIWOOL Men’s Merino Wool Thermal Pants


If you’re going to be out on the slopes for hours at a time or traipsing through a snow-filled forest on a hike, things are likely to get a little bit sweaty. These MERIWOOL Men’s Base Layer Merino Wool Thermal Pants let you fight accompanying odors by offering naturally present odor-resistance which is found in the 100% Merino wool construction. This high-quality fabric is also breathable and moisture absorbing to provide a comfortable experience, no matter how many hours you’re in the cold.

best mens thermal underwear meriwool Image courtesy of Amazon


10. Odlo Thermal Underwear


Odlo’s thermal underwear boasts a vibrant electric blue gradient that will be fun to wear under gym clothes or just walking around casually at home. All the standard sweat-wicking and comfort features are present here, but there’s a little design detail that we love: the back of the knee has a slightly perforated mesh that allows for great breathability in an area that can get very sweaty.

odl thermal underwear Image courtesy of REI


11. LL Bean Thermal Underwear


LL Bean’s long underwear comes in a super comfortable merino wool that will feel fantastic whenever you put them on. That merino wool also ensures that they’re 100% itch free, so feel free to wear them all day long without concern. Plus, with great moisture-wicking capabilities provided by the natural wool fibers, you may actually want to just keep them on from the moment you walk out the door until well after you come back home.

ll bean thermal underwear Image courtesy of LL Bean


12. Lululemon Surge Thermal Underwear


There’s a reason why Lululemon’s thermal underwear are beloved by so many: they’re some of the most comfortable and supportive pieces of clothing around. Crafted with Nulux, this thermal underwear is quick-drying, sweat-wicking, and lightweight. Tossing them under a pair of jeans or pants will make it feel like there’s almost nothing there. Plus, if you rock them for running outside, the rich blue will pop nicely with whatever else you’re wearing.

lululemon surge thermal underwear Image courtesy of Lululemon


13. Icebreaker Men’s BODYFITZONE™ 260 Zone Leggings


If you’re already a seasoned lycra wearer, you know it provides a hard-to-beat level of comfort and mobility. These Men’s BODYFITZONE™ 260 Zone Leggings are a great choice for more active wearers and deliver active temperature regulation and breathability to keep you comfortable while you’re on the move. These leggings also boast flatlock seams and a spacious gusset to minimize chafing while maintaining a high level of mobility.

best mens thermal underwear ice breaker Image courtesy of Icebreaker


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