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Stay warm and comfortable with our collection of men's thermal shirts, designed for optimal insulation and breathability. Perfect for layering or wearing alone, these shirts feature moisture-wicking fabrics that keep you dry during any activity. With a variety of styles, including crewnecks and mock necks, you can find the ideal fit for your needs. Whether you're braving the cold outdoors or relaxing at home, our thermal shirts provide the perfect combination of warmth and flexibility. Gear up for colder weather with our high-performance options that keep you active and stylish.
$55.00
Super cool shirt fits good and good for cold weather ... long sleeves crewneck rounded hem gives you extra coverage for your stretching routines and all your multi- direction movements added length helps the top stay tucked in mesh panels on the back and under the arms add ventilation and keep you...
5
Tina1000
My teenage boy wears this top to keep him warm while playing lacrosse and football in cold weather. It is very comfortable and is a great addition to his uniform.
5
Pinky888
Keeps my son warm on chilly days outside. Used primarily under his baseball uniform on cooler days. Comfortable and washes well. True to Nike size, close fitting to the body but not tight.
5
MVB17
My son loves this long sleeve and it ’s been perfect for the gym too
5
LuckyTX247
Recently bought and it was more than what I expected. This does keep me warm especially if you use it under a shirt. I went a size bigger just in case. The fitment was well with a bit extra room.
5
Cbutgo
Great shirt!! Fits great, keeps you warm!! Very happy!!
$55.00
Warm and thin great shirt! ... Love the underarms fleece turtleneck so comfortable and keeps me worm ... Very breathable and doesn ’ t get gross smelling. ... I need this for a football game and it was thin but warm and easy to move
5
Mom101101
The weather has not been very nice in Wisconsin this spring. We purchased this for my son to wear under his uniform for the cold games and it keeps him warm.
5
K Saucier
Bought for an Alaskan trip and product kept me warm the entire trip.
5
JD2716
Used for cold, rainy baseball tournament and very impressed with the quality
5
Ann and Glen
This is a cozy and warm under armour coldgear. It ’s lightweight and can be worn as a base layer or wear it on its own. It ’s a nice fit and washes up beautifully. The grey colour is quite sharp.
5
Baseballguy3395695
This shirt provides a lot of warmth but is super soft and comfortable. Great for under shirts on the baseball field or in the stands watching. Also used for outside work as it wicks moisture while providing warmth. I have not gone for a long run in this shirt as it may be too warm for that.
$55.00
Good balance of warmth and comfort. ... He said it was very warm and felt great underneath. ... Keeps you warm during chilly Spring games without constricting range of
5
CaptDave13
I really like this shirt at the gym. It ’s very light and comfortable. Fits loose which is perfect when working out. I would recommend this shirt even for hanging out.
5
K Saucier
Bought for a trip to Alaska. It kept me warm the entire trip.
5
MamaToHayden
I purchased this for my boyfriend for Christmas and he loves it! He wears this for all his outdoor activities and he is never cold.
5
Old Antarctic Explorer
Product is excellent for cold weather hunting, and any cold weather activities.
5
Cmolina
I work in a cold storage warehouse; it does keep me warm through out the 12 hour day.
$45.00
Needed an extra layer for cooler weather runs and this worked perfectly! ... This shirt is the perfect layer to put underneath a sweatshirt or long sleeve to help keep my husband warm at football game, outside work,
5
Batboy28906
Bought this for under my sons baseball uniform for colder spring nights. Definitely worth the price. Cost effective and great product
5
Aw14
Feels good and kept me warm. Will definitely buy more.
5
Acalheel
Good for cold days on the field. Needed when it ’s windy and cold.
5
Hatethecold
These were a good deal. Great price on sale and warm.
5
AB643
So comfortable; bought a second color so I could have another one
$45.00
They seem to keep him warm and fit well under his shirts. ... Is absolutely as good as any premium cold weather gear you 'll find. ... Keeps him warm while
5
My husband loves this for when he plays softball in cooler days
5
Jules55
I love these shirts. I own 5 of them now and will purchase again.
5
Eve1223
I bought this for my teenage son when he plays soccer in freezing cold temperatures. It keeps nice and warm!
5
Jonathan in OH
Super comfy and breathable. Low price and nice fit
5
newbaum
Warmer, comfier, better fit that UA definitely give them a try
$55.00
My son used this shirt for soccer and it was perfect for those colder nights! ... nike® dri- fit technology moves sweat away from your skin to help you stay dry and
5
Fin10win
This has replaced all other gear as my favorite workout shirt for anytime except summertime...
5
mcsarah2019
Length and fit were great. Was true to size and did not shrink
5
Scott 905
I use this shirt underneath my hoodie during winter snow removal. I like how warm and dry I feel after any cold weather activity.
5
Travels
Great base layer for cold days on the track. Fits great!
5
Joe gifts
Love the material. It definitely keeps you warm. I ’ ll be ordering more
$55.00
So warm and fuzzy inside. ... Excellent material compress shirt to wear underneath to keep my son warm during his games ... Always the brand of choice for Cold Weather sport
5
mikek849
The shirt serves the prepose it gives you a thin layer of extra protection from the cold. it is form fitting and comfortable.
5
BobShopper44
The fabric is really warm and comfortable. Nice colors and true to size.
5
JayStan
Bought this for my 16U son because Spring baseball in the northeast is COLD! Very good quality and keeps him warm. Would highly recommend! Price may be a little high but for the quality it's worth it.
5
PrideOk2
I have a high school baseball player in Colorado and this has been a perfect addition to his wardrobe to stay warm and have the flexibility to play. Loves it.
5
LB2010
Bought this for my teen baseball player, keep him warm in the cool early spring weather and had a tighter fit like he likes.
$60.00
compression fit shirt 4- way stretch material moves better in every direction mock neck design offers added coverage for a comfortable fit long sleeves deliver complete
5
Joel2325
Cold Gesr turtle neck never lets me down. Always keeps me warm during the winter& I had to get some new gear. Will be back for plenty more!
5
Muhamed Ali Hawk
100% Satisfied Like Always, My Forever Favorite Brand, I Bought Five In Black Color, All Fit Perfectly, Nice And Soft Material, Thank You UA.
5
Blackknight89
I bought this to wear on the golf course during cold weather. I don ’ t particularly like to over layer when playing. I like the tight fit and moc turtleneck. It is extremely comfortable and can even be worn in moderate to warm temperatures. It came out of the wash in perfect condition. I would recommend this product to friends and family.
5
Paulie84
Super comfy true to size and keeps u warm in cold weather
5
JE Eggers
Fits great, and keeps we warm
$85.00
no matter the season or the activity, this base layer is made for it. ... Great quality, ordered for my husband for Christmas. ... He loved it.. would order
5
MAJB
Great quality, ordered for my husband for Christmas. He loved it... would order again.
$45.00
220 gsm thermal fabric 70% cotton/ 26% polyester/ 4% spandex ... back shoulder jersey yoke overlay front jersey pocket with button one and only clip label back neck woven
$46.99
dry technology wicks sweat and dries fast rugged flex stretch technology is built to move odor- fighting technology ... force fast ... crewneck long sleeves concealed thumb loop holds the sleeves in place strategic paneling provides breathability smooth flatlock seams reduce chafing tagless label...
5
Ecko
It's a great fit i will get another one but this time in medium size. It's a hit& miss on my end.
$70.00
These thermals fit great, feel awesome and meet all my expectations in function. ... Perfect for winter ... I work snow removal and this was perfect to wear. ... Warm and
5
JTBo
Excellent product…very warm
5
Base 3
Great feel true to size while being slightly snug which I prefer!
5
Kar1388
Super comfortable and snug fit. Perfect for cold weather
5
HB1153
I was pleasantly surprised by how warm this base layer really is. It made all the difference during outside chores this winter.
5
Proline1988
I work outside all year round minimum 8 hrs a day. I 've tried many different brands of long John's but nothing beats Under Armour Cold gear 3. 0. Keeps me warm and dry. Very comfortable to wear. Cost more than the traditional long johns but well worth it. I definitely recommend this product.
$100.00
I wear these for while working outside, and they do a great job of keeping me warm while I ’ m doing light work. ... I was amazed how warm and comfortable this
5
Fits like a glove, great material, true sizing.
5
SK719
Keep me warm while doing ice rescue training
5
DannyRK
South Carolina experienced extreme cold weather this winter, but while wearing my 4. 0 crewneck, the cold weather did not phase me not one bit. I see why the athletes opt for this gear during cold weather games.
5
JohnG111
Absolutely amazing- wore on single digit weather and only my hands and feet were cold
5
Dh2207
I bought these for my boyfriend who is an avid hunter and Lineman, he loves them! They keep him warm without getting sweaty!
$60.00
These are very comfortable and keep you warm. ... I have to work primarily outdoors, and these help to provide that extra level of protection without being too heavy or
5
Micheile
Feels great keeps you warm
5
NHummingbird
Very comfortable and good for mild to moderate cold weather. I would recommend
5
Brian31
This 2. 0 is comfortable and warm. Perfect baselayer to shred the slopes with. Wicks moisture as advertised. Awesome shirt
5
Jeff H 150
Great fit and very comfortable. Very warm when out in the elements but not too hot while working inside. Would definitely buy another one.
5
Kpax1
This base layer is warm, comfortable and lightweight.
$36.00
quad- blend fabric technology allows heat retention to keep you warm ... relaxed fit long sleeve shirt ultra- soft brushed interior offers all- day comfort and warmth true comfort stretch for ease of movement non- deforming design helps hold the shape tag- free design provides a fuss- free wear...
$39.99
I bought this to wear skiing in Tahoe and it kept me nice and warm in 20 degree weather. ... They were soft and comfortable enough to wear around the base of the mountain when not skiing, and they kept me warm when was doing down the
5
Meals
Bought these specifically to wear while skiing in the Rockies in Colorado in January. They were soft and comfortable enough to wear around the base of the mountain when not skiing, and they kept me warm when was doing down the slopes. Have no complaints about this shirt. It was perfect
5
CHutson
I bought this to wear skiing in Tahoe and it kept me nice and warm in 20 degree weather. I love how the back is longer and doesn ’ t ride up.
4
Zephyr TX
I bought this for my teen to use as a base layer for skiing and sledding. It kept him dry and warm and fit him well. I bought a duofold base later too too and liked the duo fold a little better as far as stitch quality and material quality and the duofold material seemed a little thicker but I ’ m keeping this one too.
$34.99
It is warm and comfortable. ... Very comfortable! ... LOVE❤️Love these things don ’ t sweat keeps me warm and dry makes me wan na cry reach for the sky ... Very warm More like a
5
Michael 8
Bought this as a base layer. However, it's a very warm and roomy pull over that could be worn as a main layer.
5
Firelion
I bought this baselayer to use for my recent snowboarding trip. The weather was windy and 8 degrees each day. I already owned the baselayer pants which were military issued. This top was perfect. It kept me warm for 3 days. All I used was the baselayer and a hoodie with my ski shell over the top. Perfect setup all day long.
5
Mike2380
Nice warm shirt. Not too thick. Very comfortable!!!
5
MercManSniper2A
LOVE❤️Love these things don ’ t sweat keeps me warm and dry makes me wan na cry reach for the sky
5
LabDad
I have used ColdPruf gear for about 3 years. Living in the northeast it gets cold. These products can not be beat. I highly recommend them to everyone.
$60.00
fit short sleeve, crew neck shirt standard fit team details team graphic screen- printed on front nba® hardwood classic and mitchell& ness® branding screen- printed at left hip additional details officially licensed by the
$44.99
My fiancé loves to layer it to give an extra layer of warmth without the bulk. ... You feel instantly warm and cozy when you put this on. ... They 're warm, comfortable, and definitely work for my vet
5
AnthonyV
Very comfortable and warm, while also lightweight, perfect for a few days on the slopes!
5
Denise
[ Keeps my husband warm when he works outside! Will purchase more
5
SOCORROV
They are a Christmas gift but the material is awesome.
5
ArturoR
It is amazing, kept me warm when the tempt dropped to 17°F
5
Slim67
Lightweight, soft and warm, just what is need from a base layer
$55.00
classic and simple, versatile thermal knit fwill keep you warm no matter what the weather brings soft, comfortable fabric crew neck long sleeves ... machine
$80.00
Yes, it is warm. ... If I wanted a lightweight base layer for, say, the Ghost Shadow Hoody synthetic down jacket, it ’s an excellent pairing. ... I find it incredibly warm for its
5
E Rubble
Reviewing this from the POV of an end user& tech fabric geek. Love the materials of the MH AirMesh. Already have the hoody; just bought the crew. Agree w/ those who say it's very warm when at standstill or w/ a wind layer over top, yet while moving or with wind and no wind layer it's like being naked. To me that says the fabric is functioning precisely how a base layer shoulder. Only con is hypothetical: delicate fabric. I 've had no issues with snags, pilling, abrasion, etc. But I would n't be surprised were I to, given the softness of the fibers and the openness of the fabric they 're arranged into. Cut/fit are unremarkable w/ exception of the somewhat high neck hole and the different accent fabric used there. Packs tiny, resilient fibers bounce back into shape immediately. Most comparable to the Patagonia Cap Air wool base layer, minus the itchiness/roughness and the ultra premium price point. Also, like Polartec Power Stretch pro, but much lighter and more airy fabric, fwiw.
5
Friestadt
I recently purchased a red version of the AirMesh. I find it incredibly warm for its weight. Packs down to nothing which is very helpful.
5
Ruff Ruff
[ My daughter bought me this shirt last year for my 90th birthday. In hot weather or cool temps it seems to trap the air and is the perfect shirt. I have gotten 3 more in sundry colors for myself, one for my wife, and a crew neck airmesh for my adult son.
5
Evan
In the first image, it is very light and breathable, but the fibers inside seem to be easily lost, and there are some fibers in the hand after a little scratch. I am 167cm tall and my bust is 98cm, so I wear a size M which is very comfortable. I bought 2 at the same time, for me it should be good for sweating a lot without losing warmth. I tried wearing it the other way around and it was a different feeling, like a normal sweatshirt. A very special piece of clothing, worth trying. When washing, do n't turn it around, it's better to put it in a laundry bag
5
JP
Love this shirt. Wear it all the time and have already ordered another one- so comfortable. If they eventually make a short sleeved version I 'll buy that, too. It's a great base layer and good for cool/cold weather chillin'. Be aware that there is zero wind blocking- it's a mesh fabric- you must have a shell if you 're hiking/skiing/walking to mailbox. That said- I 've hiked in 15- 20F with wind and just this base and a heavy shell no problem. Note: It's very `` roomy ''. Great for me, but if you 're a bean pole you may be swimming in it- think about that when selecting sizes.
$100.00
knit™- engineered body mapped technology? to regulate your body temperature and? let your skin breathe during high- intensity activity cool- lite™- a lightweight and breathable fabric blend raglan sleeve construction for mobility gusseted underarms for mobility and comfort thumb slits keep your...
5
Mark
[ I am getting synthetic products out of my wardrobe and I have become addicted to Icebreaker long sleeve layering shirts. They are extremely comfortable, come in a variety of nice colors and weights, so are quickly replaced my synthetic top layers.
5
The Greek
[ This is one of two or three of the most amazing clothes I have. Technically it's a base layer but it's something I wear almost anywhere with the right pants and shoes. It's wool, but it's incredibly soft and comfortable. It works great as a base layer, but it's versatile.
5
Fredrick
[ This color is perfect, very beautiful and should be used again and again. Ideal light weight garment for fitness. Very breathable.
$45.00
I wear a size Medium and it fits just right. ... fits perfect on my fiance. ... great fit ... Purchased this online because it was a very good price. ... Fits great, and looks even
5
Nick is my name
Purchased this online because it was a very good price. Fits great, and looks even better. I wear a size Medium and it fits just right.
5
1dory3
fits perfect on my fiance. He wears them for cold days.
See Price in Cart
WAS: $129.95*
This shirt is a must- have for all winter activities. ... Very comfortable fabric. ... Must have for winter ... Great shirt that is true to size. ... regular fit shirt constructed with flannel, waffle fleece- lined fabric to keep you warm during winter fishing off- shoulder seams for comfort slight...
5
TimothyB
Nice shirt- accurate sizing- looks nice and is a warm shirt for any activity but especially out in the river in winter
5
ScottM
During the recent cold snap of- 40 I put a thermal underneath this it kept me warm. Amazing quality.
5
WadeC
This a great shirt that is really warm and fits perfect. The shirt is well made like everything that Simms makes.
5
Lake Rat
[ Bought this for an upcoming trip to Alaska. The fleece lining should be perfect for the morning boat rides up the river. As usual, high quality stuff from Simms!
5
Gordo
[ Great shirt. Runs big. I normally wear an XL I 'm 6- 1, 195lbs but a Large fits best. Warm shirt and quality built. A little pricey but hope it lasts.
$130.00
slim fit to follow contours of the body made with merino sport yarn: combines durability and fast dry times of polyester seamlessly knit mesh ventilation designed to keep you dry and comfortable 3d mapping provides maximum mobility ribbed elbows provide added durability mesh zones for better...
5
LPaul
[ I was looking for wool thermal layer for my husband, who runs cold. Rather than settling on a bland look, I chose this colorblock version for its added style. While he does n't fill it out quite as nicely as the model(!), he looks great in it.
5
rahoran53
[ I bought the Smartwool to keep me warm and comfortable on a 12 day trek in Nepal. The performance was outstanding and, as advertised, it was very breathable to keep me warm and even cool in the afternoons. It has a very comfortable feel and looks great as well.
$35.00
great comfy shirt ... My son bought this long sleeve he states it ’s very comfortable great quality and is true to size. ... Great for cool fall nights ... It kept him warm and didn ’ t get in the way playing
5
FrancisSD
From my experience, Under Armour has the best compression shirt. Other brands have compression shirts, but UA ones last longer and stay in the compression form much longer. I continuously buy different colors and lengths since I wear UA compression shirts to the gym most days.
5
Benjibunch
I bought this for my husband to wear during the cold months under his work shirts. He wears a Large normally but prefers these shirts to be snug fitting, so I bought this in a Medium. He loves the feel of the material and the excellent feel and comfort. We both love Under Armour attire and accessories. Under Armour closely fits our clothing style. Thanks!!
5
Firefighter Jim
One would think that being a compression shirt it would feel too tight and uncomfortable. However, I found the shirt, after wearing it all day outside being active with the granddaughter, very comfortable. As you can see, I wore it while engaging in various activities throughout the day.
5
Dan S H
The heat gear shirt is comfortable and stylish. It has all of the top qualities of needed to be a form fitting for multiple purposes. I highly recommend those product to anyone interested in a top performance long sleeve top.
5
DCmotivated
I own several of these shirts in different colors. They are perfect for working out because you better be in shape for it to fit properly. OR, be working out to get in better shape so this shirt looks like it should look like on you! You will be fine just get it!!
$28.00
Comfortable Base layer ... I wear it as a base layer for cycling, and it keeps the sun off your arms and does a good job of keeping you dry on the ride. ... Super
5
Megs112
Kid uses it for under her jerseys. She likes it so there's that.
5
Cy18
Bought these last month for my son and his night practices and he loves. Comfortable and does the job.
5
Beady eyes
Bought this for local high school perfect in all aspects
5
Prouddaddie
I recently purchased this for my teenage son. Feels comfortable on skin. Fits to size.
5
FJBaseballSJR
Good quality for the price my son wears them under his baseball uniform to keep warm in the early part of the baseball season
$46.97-$119.99
WAS: $119.99*
regular fit shirt woven fabric with multi- dimensional surface structure delivers superior moisture management darts at the elbow and back allow the shirt to seamlessly curve and contour to your body 1/4 zip closure offers an easy on and easy off thumbholes deliver all- over coverage reflective...
5
Koj2222
Very comfortable and great for workouts. Love the fit
$44.99
quick dry lightweight flexible and durable crew neckline construction: comfortable neck opening that keeps shirt in place during running, training or lifting
$70.00
They have great temperature control and when I sweat it dries quickly, they are also very soft and comfortable. ... Great lightweight shirt that breathes well but looks nicer than Columbia
5
Duncansfamily
Durable for hikes and outdoors but tailored enough for indoor wear for my teen son.
5
JDRynn
[ Ca n't go wrong for the money. Cut is perfect, unlike a lot of trekking shirts that have baggy upper arms.
5
Ray
Best all around shirt ever. Comfortable, Durable, and Attractive. Easy to hand wash, and great for Travel. Provides excellent sun protection for arms, and can easily transition to short sleeve if desired. I have used these shirts for 2nd layer daily wear for decades. I have no idea how many I have purchased. As the shirts age, I switch from everyday wear to yard work wear. I wear them until I can see thru them. Highly recommend. Will not disappoint.
5
CRuss
Bought in Tucson I wish they had more colors: navy black tan forest
5
RR
extremely light weight with excellent UV protection.
$35.00
Very comfortable ... 100% soft- spun polyester: provides a soft, breathable feel that wicks away moisture ... fit& design incredibly versatile design for all- day tournament wear great for training sessions or as a layering piece underneath your
5
Freddy Red Shoes
Bought his for my son and he loves the fit and material.
5
Caseyrj
I purchased for my son for Christmas. He loved it. Wears it a ton
$89.00
lightweight, quick- drying fabric pfc- free dwr finish repels water strategically placed mesh panels for increased airflow and stretch upf 50 fabric filters harsh uv rays two chest pockets: one snap, one zip security pocket two deep side pockets printed logo at left
5
Samwise
Great shirt for travel. Lightweight, dries quickly, and resists wrinkles. Size Large- 6 ’ 200lbs. Fits great with a little room.
5
MC
Love these shirts, I bought in the navy and beige and wear them multiple times a week. Material is super lightweight and durable, fits true to size. I hang dry these and they dry super quick.
5
A. Concep
I work for the Depart of Food& Ag and spend most of my day in the field surveying& inspecting insect traps. This shirt with the extra pockets near the waste is amazing. Easy click buttons are nice, BUT, they have unspaped a few times if the shirt gets caught on something. I suppose I would rather have the shirt buttons un- latch than have the shirt itself tear. It's also nice that the UPF is strong. Another complaint is that is holds wrickles a bit well. However, all n all, it's a great shirt o highly recommend.
$110.00
regular fit long sleeve
$115.00
slim fit 100% merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance fit updated to improve functionality while enhancing aesthetics for a range of body shapes back body seam wraps to front for body- enhancing fit crew neck with...
5
Mele
[ I bought this for a gift for my daughter who works outside in Oregon winters with the horses. She loves it- Warm and cozy and fits like a glove! great base layer! Smart wool has been my go to for years!
$35.00
the screen- printed design celebrates your favorite places to rest and recharge. ... this versatile shirt can be worn on its own or layered underneath a jacket, making this a great choice for a variety of
5
Marie
I needed some new shirts for work and stumbled upon this shirt in- store. I really liked the simple designs on the chest and the back. I did n't even try it on in store and just bought it. When I got home I tried it on and it fits so nicely and comfortably. The material is n't too thick or thin. It somewhat still feels very breezy but also keeping you warm enough. I got the shirt in black but I may have to get the other colors too to have a variety of the same shirt!
$85.00
Warm, soft, durable. ... Very good heavy weight flannel shirt ... Bought the medium and the sleeves fall just right on my hands. ... Not at technical piece obviously, but great for home, office, and
5
FlyNavy
Great fit( not too baggy), pocket pattern is matched to the shirt- body pattern( requires care and extra material), the heaviest flannel I have ever owned.
5
Guy from Wisconsin
This is a really comfy and warm shirt, it's become one of my favorites for the cold weather.
5
Mike M
Nice shirt that feels great. I like the weight of the shirt.
5
Mazzy
Favorite flannel. Overall style, color and quality makes this a no brainer.
5
Seattle
I have 5 of these in different colors. Without a doubt my favorite day- to- day shirt. Warm, soft, durable. Not at technical piece obviously, but great for home, office, and town.
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