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Stay warm and comfortable during cold weather with the best long underwear for men. Designed for optimal insulation and moisture-wicking, these essentials provide a snug fit that moves with you. Whether you're layering for outdoor activities or lounging at home, our selection features breathable fabrics that keep you dry and cozy. With various styles and weights available, you can find the perfect pair to suit any occasion. Embrace the chill while enjoying unmatched comfort and performance with our top-rated long underwear options.
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WAS: $49.99*
Super warm and perfect fit. ... Stitching on item is top shelf. ... The morning temps were about 4* between the base layer and my jacket I was comfortable. ... It fits nicely with no
5
KKinzler
My husband loves these!! He practically lives in them. When working on the farm you find yourself running in and out of equipment during those cold months. Just a heads up they will shrink if put in dryer!
5
PedroC
[ Does the job! Stitching on item is top shelf. Keeps you warm. What more could I say?
5
AntonS
Super warm and perfect fit. Would definitely buy again.
5
MildredM
[ My grandson loves the feel the fit the comfort of these thermals he also loves the thumb ring at the end of the shirt sleeve he said it's easy to keep it down while he's putting on other layers.
5
JohnnyK
[ Bought them for hunting tried them out over the weekend. The morning temps were about 4* between the base layer and my jacket I was comfortable.
$34.99
They are very warm and very reasonably
5
Outdoor manly
Bought these on a whim to try out for working in the cold weather. I use them as a base Layer. They are very warm and very reasonably priced!
5
Happy and I know it
$120.00-$145.00
This is the best mid weight zip neck base layer I ’ ve ever owned. ... Best of all I can wear it without worrying about the dreaded polyester stink, its stays fresh for
5
Kevin C.
Excellent slim fit. Love that you can wear with shorts or pants, hiking and nice to wear out with friends. Very comfortable while keeping your core temperature comfortable.
5
Matt K.
I bought this Hoodie for a cold weather trip in the fall. Great fit& style. ove the black with gold contrast. It's a great base layer and will hardly takeup any carry- on room. Great produt from SmartWool!
5
Kevin C.
Absolutely love the lightweight fit and comfortability. It fits true to size. This is my fourth purchase of this line. Each has been exactly the same in fit and comfort. And amazingly the fabric keeps your body temperature warm yet it allows it to breathe with changing temps to create a perfect balance of core temperature.
5
Jeff D.
I live in the northeast part of the country and the climate is cold in the winter. I love my Smartwool base layers. I have had earlier versions of this base layer and I was able to get a newer version on sale( lucky me!!!). I tried it on and the material is super soft and comfortable.
5
Joseph M.
This is the best mid weight zip neck base layer I ’ ve ever owned. The quality of the fabric is unmatched. I ’ ve never had a Smartwool garment that pilled. It looks good enough to wear as a shirt/sweater. The zipper is first class and the neck doesn ’ t sag. I were it as a base layer skiing all over the IS and Canada, cycling in cold weather, and under a shirt all winter to take the North Atlantic chill of fall through spring. Best of all I can wear it without worrying about the dreaded polyester stink, its stays fresh for ages.
$85.00
He loved it. ... Great quality, ordered for my husband for
5
MAJB
Great quality, ordered for my husband for Christmas. He loved it... would order again.
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WAS: $44.99*
I ’ ve used it for skiing and also just lounging around the house. ... It ’s warm, breathes and I don ’ t get sweaty going from cold to warm. ... I like these a lot more than other base layers- many of them ride up, but these do
5
HH
[ Great thermal. Very heavy very warm. Pleasantly surprised it did not shrink when I washed it.
5
CurtisK
I ’ ve used it for skiing and also just lounging around the house. It ’s extremely comfortable and quickly becoming one of my favorite shirts.
5
MicahB
This is great base layer! As far as the appearance parameter goes, I suppose that is limited by the user. But the shirt itself is great.
5
AlanL
I work outside at our airport, mostly outside for hours at a time, sometimes in and out in and out. This piece surprised me. It ’s warm, breathes and I don ’ t get sweaty going from cold to warm. I ’ m 5 ’ 7 165 43 chest 33 waist. I went large and got a perfect fit. I ’ m usually between medium and large in Carhartt so, I have to gamble on everything I buy. This is a winner for me.
5
LucasH
These are great! The tall size fits very well and help keep the chill off when I ’ m working in the cold
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WAS: $44.99*
They fit great and keep me nice and warm working outside in the wind all day. ... I bought these so I may continue playing golf in the colder weather. ... Keep
5
Cynthia
[ My husband said he will never wear anything else since buying these he ’s in love with them!
5
JustinK
[ very nice product here. Keeps me warm in 30 degree weather with gusts, and matches the same style top baselayer well. Overall great buy.
5
EricG
Very comfortable and warm without being too bulky underneath a pair of jeans. Highly recommend!
5
LantzW
Easy to put on great fit and feel
5
Rico 51
I bought these a month ago and absolutely pleased with the quality going back to buy two more and they do keep you warm.
$20.99
WAS: $24.99*
These are the best thermal shirts to wear under layers or as the only layer. ... This ColdPruf Basic Crew is the perfect addition for my morning walk on those cold Wisconsin
5
Uhdr54
I purchased this also for my father and he just loves it.
5
nickname111111
i get cold easily. this helps. thank you very much
5
LALO4U
This is great for people who work outside keeping you warm and comfortable
5
Drello
These are the best thermal shirts to wear under layers or as the only layer. They have a great fit that keeps its shaps and does not shrink. Love it
5
Mark
I got this about a month ago to prepare for cooler days and it works great. Warm and comfortable.
$51.99
Best value for quality base layer pants, would highly recommend. ... My teenage son wears these as Baselayers skiing and they are perfect for 20 degrees and
5
Outdoor T
Best value for quality base layer pants, would highly recommend.
5
Lena
Purchased as a Christmas git. My dad loves them and wears them to keep him warm
5
TBKY84
Very happy with the Carhartt mid- weight base layer pants. They do the job and having a fly is helpful at sporting events.
5
No nickname
I bought this pretty recent and so far it ’s been great to have! It been keeping me warm and and it just been a great purchase.
5
Will
Keeps me warm and is a good fit. Customer service at the store was great.
$54.99
They keep you dry and warm all day long and they don ’ t bind while under regular clothes. ... Very Warm, Comfortable Thermal Pants ... This is an awesome base layer pant for cold temps and winter weather very warming but not
5
Robert
Bought these to use as an alternative to fleece lined work pants. Much prefer these as it provides more flexibility, yet keeps you warm. They fit well and pair with my canvas work pants. I particularly like the idea that if the weather warms up enough, I can simply take them off, whereas with lined pants, you 're stuck unless you keep an additional pair of pants with you. These launder well too. The seams in them are placed well so there's no `` tugging '' or tightness. To me, they 're a great cold weather investment.
5
RonaldR
[ Really good and very warm comfortable insulated pants.
5
ToddS
Had the chance to trial these on a field test, very warm and durable. nice snug fit, plenty of room to flex and move. No need for extra layers with these, wore with Carhartt lined bibs and was very comfortable all day
5
DanielF
I received this set of base layer pants for a Carhartt Crew Filed Test to test its warmth, comfort, and durability in real world working conditions. This is by far the warmest and most comfortable set of base layer pants I have ever worn. I wore them over the winter in Colorado and Wyoming in cold weather, heavy snow, and strong winds. I was warm and comfortable no matter what Mother Nature threw at me. They wick away moisture and move with me all day. I would recommend this base layer for anyone who works outdoors in the winter.
5
PatrickK
Received these thermal pants for Carhartt field testing. They strike a nice balance between being very warm, lightweight, and comfortable. Wore under double- front jeans or canvas pants in single- digit temperatures with negative wind chills and my legs stayed warm while moving/working. Their light weight is nice for putting in a pack if it gets too warm while hunting or hiking. They are also comfortable to lounge in in warmer temperatures! Pants are true to size and seem durable, however, I have heard thread stretching when I put them on from time to time( I wear size large and am between a 34- 36 waist).
$39.99
WAS: $44.99*
Have worn it twice- nice fit, very soft, nice base layer that keeps you warm ... Was exactly as advertised and is a very comfortable fit ... On warmer ski days( 20- 30 F) this works perfectly with a layer on top under ski
5
Dad71
Have worn it twice- nice fit, very soft, nice base layer that keeps you warm
5
Jeff
Was exactly as advertised and is a very comfortable fit
5
Jack in Leesburg
Keeps me warm. Does its job. I ’ ll buy another one soon
5
Peter
Very warm and manages moisture transfer as advertised. Great baselayer.
5
BJ Butterball
Perfect fit! Great Value! Quality! Rewards! Location!
$159.99
Best! ... Best of all, I can charge my phone with the powerbank! ... keeps my legs warm under my jeans. ... I wanted some warm longjohns for skiing so I got a pair for
5
I work in construction, this product has been great during the colder months! They keep my legs warm, and they are n't constricting. Best of all, I can charge my phone with the powerbank! I would recommend this item to anyone that does n't like being cold( not just people that work in the trades)
5
Derrick
The thin material plus the heating elements are perfect combination for going outside in your favorite jeans
5
V
Used in temps with below zero wind chill. Worked perfectly without making me too hot.
5
Ed
The quality of the bottoms is great. Work outstanding on a cold night ride. Thin material that fits easily beneath my jeans.
5
Danny
This might sound silly but I wear these under my shorts on the way to the gym, and they really keep my legs warm. Great buy
$39.99
WAS: $44.99*
Best warmth ... really comfortable and warm ... Product I was looking for was available, checkout was quick and easy, employees were efficient and friendly. ... Keeps me warm and comfortable I would buy these
5
Psycho
Fitment is perfect, warmest I 've gotten! May have to buy more!
5
Tkan
Product I was looking for was available, checkout was quick and easy, employees were efficient and friendly.
5
Charlie
I ask for duofold wool and cotton combos, but they are impossible top find anymore. Ny wife gave me two pairs of the Platinum II Pants from ColdPruf for Christmas. They have the same insulation value as the duofold but are less bulky, and much more comfortable due to the merino wool. I like these better than my underarmor, too, easier on and off. Kudos for a fine product.
5
Adawg
Bought this for a ski trip and worked great. Stayed warm all day.
5
Riri
Happy with the purchase. Will definitely purchase again!
$115.00-$125.00
Went skiing at altitude with this as my base layer and it kept me incredibly warm! ... It's a great color and it's comfortable. ... Perfect base layer! ... My husband loves
5
Just another white guy
Went skiing at altitude with this as my base layer and it kept me incredibly warm!
5
Enjoy
My husband loves it. It's a great color and it's comfortable.
$115.00
[ I got these as a gift for someone and was impressed by how soft they were. ... Very comfortable and warm. ... Perfect for the cold winter months! ... Exactly what you expect from smart wool base
5
Connie
[ My old lady and I have the smart wool top and bottom 250 base layer set. They are exactly what you expect from smart wool. Great quality, the warmth I needed, and pretty useful in most conditions. If you need a base layer or something lightweight to wear on a chilly/cold night- These are useful and for great value.
5
Britt802
[ At first these pants feel sort of itchy but once you 're moving around in them it's very comfortable. I first wore them in 35- 40F under normal hiking pants and was too warm while moving. They do regulate body temp well but I wo n't be wearing these hiking unless it's below 35F. I 'm also not a cold bodied person and I move fast.
5
jjrunning
[ We live in Minnesota, and have pretty cold winters. This baselayer has kept me much warmer than my old baselayers, so far! Great for running, walking or casual use. I plan on using them for a winter camping trip coming up as well.
5
KonaSunsets
[ Bought these as a gift. My daughter said her husband LOVES them. He's had a pair for over 10 years and they are worn out. So a new pair was needed.
5
jackie27
[ I got these as a gift for someone and was impressed by how soft they were. I haven ’ t worn them, but he ’s said they ’ re very warm and not itchy at all. I ’ ll definitely be buying a pair for myself soon!
$125.00
Perfect weight to stay warm in cold weather. ... I love how they keep me warm but do n't make me hot. ... He said the fit was true to size and they kept him warm while snowmobiling and
5
tjflan2
Fit true and worked outstanding as base layer for football game. Very comfortable and breathable.
5
Mountain time
Fit great especially in length. Perfect weight to stay warm in cold weather.
5
Kwhendy
Bought these about a week ago and wear them nearly every day. I love how they keep me warm but do n't make me hot.
5
srgmnh
These really are a step above. Great fabric, great warmth, hold their shape well. Worth every penny.
4
Jdub
Smart wool has always made quality products and these are no different. But… awfully pricey for a pair of long Johns!
$60.00
Fit good and can be used similar to winter long underwear ... These long johns are perfect! ... Great for cooler weather and running ... The side pocket is a great feature- more than enough space for my cell
5
tammydee
My husband loves the Cold Gear Under Armour. It keeps him warm all day working on the river. Fits good too.
5
Smerdikov
This product keeps me toasty while working out in the Northeast.
5
Dwilton
Great wind tights for being out in the cold. Fit good and can be used similar to winter long underwear
5
Beach25
These Cold- Gear leggings are perfect for layering on cold days. Fleece lined make them so soft.
5
DReadyoff
I 've been very happy with this purchase. Despite being a thin fabric, it has been holding up really well in the cold weather. The side pocket is a great feature- more than enough space for my cell phone.
$90.00
Smartwool base layers also make the best all- season pajamas imaginable. ... [ I 've long been an unabashed devotee of all Smartwool products but their base layers, like the classic all- season merino long sleeve shirt, is truly the best money can
5
JD L.
Like most Smartwool products I have purchased, this one is a nice weight, completely soft and comfortable AND attractive. I get compliments on it all the time.
5
Mike B.
Super comfortable first wear while on a 2 day backpacking trip. It made a great base layer and then when temps when up it was nice on its own. And a layer of sun protection with long sleeves! Odor control was evident, but control being the key word-- definitely not absent. I recommend this shirt and look forward to using again on the next hike and for my trip to the Tetons next month( as well as trying as a base layer for snow skiing!).
5
BJ
Perfect base layer for Spring in the mountains. Not too light, not too heavy, just right.
5
B
Love this shirt! I hate wearing synthetic material and this feels great and does a GREAT job as a base layer Also looks decent just to wear around
5
Peter K.
Fantastic light weight long sleeve Tee for hiking. I already have two and will purchase a third!
$130.00-$150.00
Functional and stylish ... [ This is a quality built base layer and I 've worn it by itself or under a light jacket for plenty of warmth. ... It ’s form fitting and the multi panels really make it articulate with my
5
MoosejawDon
[ Feels light on the skin and is plenty warm. I would like a little more move/breath ability in the pits however I do not feel sweaty. Perfect base or mid layer
5
Timoby2k
[ This has become my new favorite baselayer. It ’s form fitting and the multi panels really make it articulate with my movements. I wear it as my only layer in damp mid thirty degree runs. Also looks good to wear on its own out and about.
4
Rory
[ This is a quality built base layer and I 've worn it by itself or under a light jacket for plenty of warmth. Be advised to go one size up, especially if you have an athletic muscular build. Fits close to skin, athletic cut for sure. Looks awesome.
$41.99
Great Pair of Long Johns ... Great for hiking or any outdoor activity. ... nice, comfortable, im honestly doing this for points ... Very happy with the performance of the pants, extremely warm and
5
super nice
nice, comfortable, im honestly doing this for points
5
Way1
Bought upper and lower works great for golfing in colder weather
5
Eli3316
Great product, did not disappoint, my son works in the cold and this gear is awesome.
5
chuck
Very happy with the performance of the pants, extremely warm and comfortable.
5
Greg
Works great! I like how it feels and looks. It is a good buy if you are cold.
When selecting long underwear for men, consider features such as moisture-wicking capabilities, insulation, and breathability. Look for fabrics that provide warmth without adding bulk, ensuring comfort during various activities. Additionally, a good fit is essential to prevent chafing and to allow for ease of movement.
Men's long underwear is typically made from materials like synthetic blends, merino wool, and cotton. Synthetic fabrics are popular for their moisture-wicking properties and quick-drying capabilities, while merino wool offers excellent insulation and temperature regulation. Cotton can be comfortable but may not perform as well in moisture management.
Yes, long underwear for men comes in various styles, including tops and bottoms, as well as different fits such as compression or relaxed. Some styles are designed for layering under other clothing, while others may be suitable for standalone wear during colder weather. Choosing the right style depends on your intended use and personal comfort preferences.
Long underwear is ideal for a range of activities, especially in cold weather conditions. They are commonly used for outdoor sports like skiing, snowboarding, hiking, and running, as well as for everyday wear in chilly environments. Their moisture-wicking and insulating properties make them versatile for both high-intensity activities and casual outings.
Choosing the right size for men's long underwear involves measuring your waist and inseam to find the best fit according to the sizing chart provided by the manufacturer. It's important to consider the intended fit, whether you prefer a snug compression style or a looser fit for comfort. Trying on different sizes can help you determine which option provides the best balance of warmth and mobility.
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