Best Thermal Underwear Tops for Men of 2026

"I've been using these shirts throughout the Utah winter and I'm really impressed—they trap body heat extremely well without bulk, making them ideal for sub-freezing conditions. The moisture-wicking keeps me dry during high-output activities, which is critical once you stop moving. The compression is just right for a supportive base layer, and the value for a 5-pack is unbeatable. Highly recommend for anyone training or working outdoors in 20°F–35°F weather."

"As someone who hunts coyotes and runs outdoors in the cold, I can say these shirts are exactly what I needed. The fabric is soft but durable, and the insulation is impressive without being bulky. I love the snug but non-restrictive fit, and the shirts stay dry even during intense activity. The 5-pack is a fantastic value and perfect for rotating through active winter days. Definitely a must-have for cold climates!"

"I'm a police officer, and these thermal compression shirts have made a real difference. They provide outstanding warmth as a base layer, so I don't need to wear as many layers on semicold days. The fit is great and the stitching is high quality. I also appreciate that they hold up well after repeated washing. Perfect for anyone needing reliable warmth without extra bulk."

"I've bought several of these thermals and I'm really impressed by the thickness and softness. My husband wears them constantly for work, and they have held up great, even after multiple washes and hot drying. The fit is true to size and the quality feels better than other brands we've tried over the years."

"I was happy with the white thermal I ordered—it was exactly as expected and kept me warm. However, the black one in the same size was noticeably tighter, especially in the arms, which was frustrating. If consistent sizing is important to you, be aware there can be some variation."

"The first thermal I received was perfect—great fit, soft, and comfortable, made in Honduras. Unfortunately, the next ones I ordered were different in material, fit, and color, coming from El Salvador. I wish there was more consistency so I could buy more of the ones I loved."

"I've been wearing this base layer for about a year, and I’m seriously impressed by the comfort, softness, and warmth. Even after multiple washes, the quality and color remain excellent, and the fit is perfect for my tall frame. I’d highly recommend it—especially for anyone needing a reliable ‘big and tall’ option."

"My husband has sensitive skin, so finding something that doesn’t irritate him is a challenge. This base layer, made from 100% wool, is a total winner for him—it’s super soft, warm, and surprisingly durable. Plus, it’s a lot more affordable than many other brands. We’ll definitely be looking for more colors!"

"I hesitated a long time due to the higher cost of wool, but after trying this, I’m a total convert. It’s snug without being tight, breathes well, and the wool dries quickly if I get sweaty. After hand washing, it didn’t shrink and actually got softer. I’ve worn it almost every day since buying it—no more polyester long johns for me!"

"I really like how comfortable and warm this shirt is, especially for the price. The mock turtleneck looks great and it's perfect for winter. Definitely a good buy!"

"These shirts are my go-to for work in cold weather. They layer easily, keep me warm, and stay tucked in all day. After months of use, they're still holding up strong. I'll be ordering more for sure."

"While they're described as compression shirts, they're actually more of a snug fit, not true compression. Still, they're excellent for hiking and outdoor activities in chilly weather. Well made and a great value, just not ideal for swimming if you need real compression."

"I recently picked up this thermal and as soon as I put it on, I noticed how warm and well-fitted it was, even when it was just above freezing outside. I'm definitely planning to purchase again."

"During our last cold snap in North Texas, these thermals kept me comfortable in fluctuating temperatures, from single digits up to the fifties. They’re not for extreme cold, but for what we get here, they’re just right. After several washes, they still fit well. If I buy more, I’ll go a size down for a snugger fit. The polyester blend keeps moisture away, which is a huge plus."

"The quality of the shirt is decent, but I found the fit to be tighter and shorter than expected, even after ordering two sizes up. I wish it matched the sizing and quality I used to trust from this brand."

"When I first got these shirts, I was unsure if they’d live up to their price, since the fabric seemed a little thin. After wearing them, though, I found them to be extremely soft, comfortable, and stretchy—just the right amount of spandex. The fit is great, and I’m now really happy with my purchase."

"I bought these for my son to wear at work under his coveralls. He thinks they’re the perfect weight, keeping him warm without extra bulk, and the fit is spot on. He wears them all the time and they’re holding up well, so I’ll be buying more colors soon."

"As a tall woman, I went with the men’s large after seeing reviews about the sizing. The fabric is nice and thick, the waffle knit is cozy, and the shirts look good. My only issue is that they shrank a bit after washing, especially in the sleeves and length, but overall, they’re still useful for layering in cold weather."

"I've found this shirt to be exceptionally warm and comfortable, fitting me just right at 5'10" and 187 lbs. It’s been great as a base layer in the cold, and I appreciate the solid quality for the price."

"As a first responder in Alberta, I need dependable clothing, and this shirt has delivered. The fit and insulation are excellent, making it a solid choice for staying warm on the job."

"I bought this for my husband, and he says it fits well and keeps him nice and warm. We’re both happy with the purchase and would recommend it to others looking for effective winter gear."

"I wore this vest to a Patriots game in January, and it kept me so warm that I actually had to take off my jacket at times, even in temperatures in the teens. The heat lasted a full 24 hours. Definitely planning to purchase again!"

"During a snowstorm tailgate in Philly, this product was worth every penny—kept me incredibly warm despite freezing weather. If you need to stay toasty, don’t hesitate to get one."

"Living in Buffalo, I was amazed by how hot I actually got wearing this at an 18-degree Bills game—had to remove layers to cool down. The fit was great and I’m definitely a fan now!"

"I've found these shirts to be the perfect base layer for chilly days—they're comfortable, just the right weight, and do a great job of blocking most wind. I also appreciate the good price."

"My husband is really happy with these shirts. They're incredibly soft, fit perfectly, and provide plenty of warmth for layering. He loved them so much, I'll definitely be buying more."

"Although the sleeves are a bit short and the neck slightly snug, I got used to it and found they kept me warm. They're ideal under my scrubs, and I appreciate not having visible shoulder seams."