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We sweated it out on the slopes and while traveling to find the best thermals out there.
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In This Article
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Sometimes, one pair of pants simply wont cut it.
We tested a total of 24 sets of thermal underwear to find the best ones out there.
After stretch tests, multiple wears, and plenty of outdoor activity, these are our favorites.
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Our Top Picks
Best Overall
This set is comfortable, cute, and highly functional.
The pattern might not be to everyones preference.
And the excellent print doesnt hurt either, giving the classic Alpine snowflake motif a modern edge.
The fabric is also well-made, with sturdy-feeling seams and a smooth zipper.
The sleeves and cuffs may be a little baggy.
The bottoms run a bit baggy and they may be too warm for some situations.
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The top is equally lightweight and cozy, and the inside fleece is incredibly soft and warm.
We anticipate wearing them for many winters to come.
Best Midweight
These were so comfortable that we kept them on for 16 straight hours.
We simply loved wearing them.
We found they ran a little loose, so you may want to size down.
They dont layer as well under other tight clothing.
Its always a bonus when your gear can do double duty in your everyday wardrobe.
Weve been longtime fans of Smartwools products, and their thermal underwear just reinforced that.
They stayed in place well when we were active, though, and have impressive moisture-wicking abilities.
The material is very thin, so we have some minor concerns about potential durability issues.
They may be a bit too loose for some, size down if you want a more formfitting set.
The Paka thermals are among the softest and most comfortable sets weve tested.
The thermal bottoms are cinched at the ankles as another way to prevent any drafts sneaking in.
Afterward, we washed them according to the manufacturers instructions to see how they held up.
Each set was rated on comfort, fit, warmth, moisture-wicking ability, durability, and value.
We also plan to keep testing them for another six months to see how they hold up over time.
Recognize your own temperature tendencies and plan accordingly.
If youre spending a full day outdoors, however, youll want something heavier.
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Look for insulating fabrics
These are meant to keep you warm, after all.
This way, you wont feel soggy all day and will still be fresh for your post-ski festivities.
The solution: thumb holes.
Frequently Asked Questions
Once youve chosen your fabric pop in, there are degrees of intensity.
Light wool has a GSM of 150-190, medium is 200-300, and more than 300 is the heaviest.
It usually helps to check a brands website to assess its different product levels.
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Ideally neither the best thermal underwear has a snug but not compressive fit.
That depends on a few things.
Youre safe to wait until it gets dirty or, more likely, a little sweaty or stinky.
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Credit: Travel + Leisure
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Credit: Travel + Leisure / Julia Sayers_Gokhale
Credit: Travel + Leisure / Julia Sayers_Gokhale
Credit: Travel + Leisure
Credit: Travel + Leisure
Credit: Travel + Leisure
Credit: Travel + Leisure
