The Best Thermal Underwear for Men That'll Get You Through Any Polar Vortex

This top-rated thermal set hits it's marks due to affordability and a number of premium specs. Thermajohn uses a polyester/spandex blend for a stretchy, form-fitting feel, but the real highlight is the fleece-lining that keeps you toasty warm. What's great is the garments are moisture-wicking too, thus making them easy to wear for all types of adventures.

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You know what's better than a pair of waffle long johns? Three pairs of waffle long johns. This multi-pack from Fruit of the Loom will give you the ability to cycle through your thermal underwear for multiple days of wear—which is great if you're wearing them for work or simply wanting to wait longer to do laundry.

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When it comes to thermal underwear, you may have come across items crafted in a waffle knit. And that’s with good reason—this fabric blend does an exceptional job at fulfilling all your needs: Trapping heat, tackling odor and managing moisture through its swift-drying and sweat-wicking elements. Add to that Carhartt’s rugged flex tech that makes moving around a breeze, with the added benefits of tactically placed seams reducing chafing and improving comfort.

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You’ve likely integrated at least some apparel by the sportswear giant into your wardrobe, and if you haven’t yet, the addition of Under Armour base layer leggings is worth adding to cart. The stretchy and lightweight HeatGear fabric incorporates anti-odor tech, moisture-wicking and fast-drying properties, making it an ideal match for the man who likes to be on the move.

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If you ask us, there's still nothing better than a pair of classic cotton long johns. This pair form Ron Dorff has a cool Nordic-inspired design and is made from cozy organic cotton. We're talking zero itch and a long lifespan.

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With yoga at the core of the company’s ethos, it should come as no surprise that this base layer piece includes four-way stretch fabric that wicks moisture, dries quickly and is abrasion resistant. But Lululemon has stepped it up to the next level. These training tights include interior gripping that correspond with the body’s major muscle groups, keeping the tights in position, and aiding in muscle steadiness. Impressed much? You should be.

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Taking pride in its Merino wool items developed for the outdoors, Smartwool’s base layer tights provide more than enough warmth without any of the claustrophobic stuffiness. Thanks to the underwear’s 100% Merino wool interlock knit fabric construction (with this pair being the brand’s heaviest weight), sweat is wicked away and odors kept at bay without you losing any heat.

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Patagonia's Capilene base layer, made from recycled polyester and ethically sourced, results in a soft, stretchy and quick drying pair of bottoms that retains warmth while also working hard to wick moisture and minimize odor. Comfort is also a priority, as the seamless 3-D construction reduces chaffing while the front crotch’s double layer adds extra support to your package.

Established by textile engineers in 2002, Minus33 has upped the thermal gear ante with their base layers. A prime example of the brand’s winning pieces includes these midweight bottoms made of 100% Merino wool in an interlock knit construction. Simply put, a guarantee that you’ll stay warmed up—yet sweat-free—whether you’re up for an arctic run, a snowboarding expedition, or simply going out to grab groceries midwinter.

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Bombas' long underwear has the same high-level comfort as it's socks and underwear. This pair has no tag and limited seams, so all you'll feel is buttery soft smoothness all up and down your legs.

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The American company has long been regarded as one of the first suppliers of thermals, and even today, its items have plenty to boast about. These Icetex undies tick several boxes, from providing heavyweight warmth to the odor-battling properties of the fabric’s Silvadur Technology. Thanks to the brushed inner layer of the raschel knit, your goods are guaranteed to stay both snug and dry on your outdoor adventures.

Founded in 2011, the menswear brand Mack Weldon, which develops its own fabrics, has quickly climbed the ranks as a top purveyor of men’s basics, with its thermal underwear no exception. Case in point: The brand’s WARMKNIT fabric constructed in a micro-waffle knit and featuring their insulating Thermolite technology makes for a great base layer that keeps the temps just right.

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If you’re determined to keep your undergarment game as sexy as possible, then a pair of long johns from CDLP is the way to go. When the Swedish design house launched in 2016, it had one goal in mind: To transform men’s underwear. Fashioned from Lyocell—the most sustainable cellulose fabric found in wood—their thermals provide a more tailored look without compromising on warmth and comfiness.

A winner in versatility, this offering by 32 Degrees consists of a soft, lightweight four-way stretch fabric that’s equally functional as loungewear, gym gear or as everyday base layer pants. The biggest win? You get all of this without breaking bank.