WEERTI Thermal Underwear for Men Long Johns with Fleece Lined Base Layer Men Cold Weather Top Bottom
Condition: New
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FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Sunday, Mar 15
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Size: X-Large
Color: Black
Department : mens
Date First Available : May 13, 2020
Manufacturer : WEERTI
Best Sellers Rank: #103 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #1 in Men's Thermal Underwear Bottoms
#1 in Men's Thermal Underwear Bottoms:
Customer Reviews: 4.5 4.5 out of 5 stars 11,980 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Mar 15
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 3X-Large
Color: Black
These thermals are perfect for winter. The fleece lining is super soft and keeps you warm without feeling bulky. The fabric stretches nicely and fits comfortably under clothes. I wore them in cold weather and stayed warm all day. Great quality and value for the price — highly recommended for anyone who hates the cold!
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Reviewed in the United States on October 26, 2025 by jaber waleed alsulaiti
Size: Medium
Color: Black
Keeps you very warm without feeling bulky. Soft, stretchy, and perfect for cold work days. Great quality for the price.
Reviewed in the United States on November 9, 2025 by Adrian Sanz
Size: Large
Color: Black
The WEERTI thermal underwear keeps me warm enough for everyday use, but it’s not the softest material. It fits well and is lightweight, which is nice for layering. However, after a few washes, it started to lose some of its stretch and softness. Overall, it’s an okay option if you need basic thermal wear but not the most comfortable or durable.
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Reviewed in the United States on September 16, 2025 by Bruno
Size: 3X-Large
Color: Black
I live in warm tropical weather but went to an outdoor sporting event in Chicago. I thought it was really cold but others kept saying it was crisp. I wore these under my jeans and a jersey and jacket. Considering thee are really thing and lightweight, I was warm! I honestly feel like these kept me in the game, so to speak. If I didn't have these on I'd probable left because it was cold. For the quality these were, they are definitely worth the cost. I've washed and dried them a few times and they have not shrunk, color has not faded and they honestly feel like they would survive a full winter season.
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Reviewed in the United States on November 17, 2025 by MissLicious
Size: 4X-Large
Color: Charcoal
I participate in a lot of outside author events, including some in very cold weather. These aren't like your grandfathers' long johns. Thin but really hold the heat. Once you have them on for a few minutes you won't even know you are wearing them. Kept me warm outside for an eight hour event last weekend.
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Reviewed in the United States on October 31, 2025 by John M.
Size: Medium
Color: Black
My husband love his thermal underwear, perfect fit.. material is soft to the skin. Highly recommend..
Reviewed in the United States on November 12, 2025 by Amazon Customer
Size: 3X-Large
Color: Grey
These thermals are light but are great at keeping you warm and comfortable.
Reviewed in the United States on October 29, 2025 by George Morris
Size: Medium
Color: Black
It’s been nearly a year since buying 3 pairs and I can confidently say that they have not ripped or torn during my training, work and adventures! I recommend these without hesitation! I purchased a pair of these so that I could layer up while I work outside in the winter months. I purchased the first pair around nov-dec of 2024. The first pair I bought in medium when I was around 210-220lbs. First impression were that it fit like a glove and felt unbelievably soft. The black color really doesn’t degrade or fade in wash and stains don’t tend to stick around, so washing is easy. I use these to work out too so I can move around with no issues in these and they don’t get too hot either while doing so. Now as for keeping me warm while outside at work, I really can’t say anything bad about these. In 10 degree (F) weather it kept me nice and toasty all shift long. They are quite durable too, as I do Muay Thai in these as well and they haven’t ripped or torn yet from the drills, although my first pair has stretched a bit and fits a bit loose. I have lost a good amount of weight so that’s not a big issue. The other two pairs that I bought after my weight loss fit nicely, but I might have to downsize to a small lol. In short, I really like these thermals. I wear them basically all the time in the winter for all sorts of occasions, even when it’s not cold. I’m mostly likely going to purchase a few more sets of these.
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Reviewed in the United States on March 12, 2025 by Dean