








❄️ Don’t just brave the cold—own it with Thermajohn’s ultimate thermal base layer!
Thermajohn Long Johns Thermal Underwear for Men is a fleece-lined, moisture-wicking base layer designed for superior heat retention and all-day comfort. Featuring 4-way stretch fabric for unrestricted movement and a smart built-in fly, this lightweight thermal set is ideal for outdoor work, winter sports, or cozy lounging. Highly rated for warmth, softness, and durability, it’s the must-have cold weather essential for professionals and adventurers alike.


















| ASIN | B0DMGYTHBR |
| Best Sellers Rank | #63,332 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #98 in Men's Thermal Underwear Bottoms |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,546) |
| Date First Available | November 8, 2024 |
| Department | mens |
| Manufacturer | Thermajohn |
T**O
Perfect for Cold Weather Travel!
I recently purchased the Thermajohn Long Johns Thermal Underwear for Men, and I couldn't be happier with my choice. The fleece-lined base layer set is incredibly comfortable and warm, making it ideal for my upcoming trip to Great Britain in April. Despite the chilly weather, I feel confident that these thermals will keep me cozy and comfortable throughout my travels. The fit is perfect, and the material is soft against the skin, without any irritation. The quality is top-notch, and I hope they hold up well after multiple washes. I highly recommend these long johns to anyone looking for reliable and effective thermal underwear for cold weather. A great investment for any traveler!
R**R
Extremely Comfortable and Very warm
Very comfortable and warm
L**S
Good
Fits perfect. Wasn’t extremely snug which I liked but kept me warm. Good for the price
D**Y
Keep_It_Warm
These are solid long Johns. I work outside all the time, and when it's 35 degrees or colder—or that wind’s cutting through all day—these do the job. I layer up: long John pants, then regular pants; long John shirt, then a button-up or tee; top it off with a hoodie. If things warm up from working hard, I peel back the hoodie and stay comfortable. They're not too thick, not too thin—just right for keeping warm without feeling bulky. Layering works, and these long Johns are a key part of it.
S**K
Superior Winter Wear!
The quality of these tops and bottoms far exceed the cost — they are super lightweight and still provide the kind of warmth anyone would want (even in the rare chilled days of Texas winters). They feel more than comfortable, and have a ‘slick’ and easy touch when worn beneath any surface clothing, hardly noticeable at all — except that the cold stays outside, where it belongs. I couldn’t be happier!
G**6
So very warm!
Love these for my husband, he needs extra warmth on cold days! They do not leave you sweating, even if you are inside with them under your clothes! They are thin but lined with a short fleece, so they fit under all of your clothes! I highly recommend these! Company is great to work with, we did not receive one of our orders and they were quick to get one to me as a replacement!
J**I
Great for cold office
Everyday work wear. Keeps my dress shirts clean and don’t have to wash my dress clothes after every wear. The material feels spongy and like a thick memory foam in a way. I wear these in the winter and summer in my office because they keep the office too cold for me. These help regulate my body temperature. Also they just feel comfy like getting a light hug and little thickness to my thin dress clothes. I like the vneck because you can’t see the undershirt with a button up dress shirt so nobody knows I’m wearing thermals.
J**F
Great Solution for Cold temperature climates.
Exceptional quality at a low cost.
D**Z
La prenda es súper cómoda y cumple enteramente con su función de calentar. Las tallas especificadas coinciden con la realidad, al menos en micros. Pero creo que si eres una persona muy delgada, te quedaría sin miedo pedir talla justa.
A**H
Funciona bien para fríos de 0 a 10 grados, mantiene el calor , solo que en las primeras lavadas la tela se hicieron marcas,
P**O
Buena calidad
T**R
How do we start this? As a seasoned Canadian, I know a good thermal when I see it. Thermajohn is a brand I know. While trying to survive in the great white north, I require a certain level of warmth and comfort. I ordered this product with excitement! Warm buns = a happy man…BUT this is where it all went wrong…. The product is NOT thermajohn. It is a cheap cut of fabric, hastily sewn together. The seems and edges are just cut. The fit is not what it should be. My poor family had to witness this monstrosity. Even my Bulldogge was offended. Absolutely do not recommend this product! So now I sit with cold buns, and a defeated spirit. I wish you all luck in finding your forever thermals. Side note: kind of weird, product was received January 4th, delivery says it was delivered the 16th.
I**K
Tenían un tema de stock. Yo hubiera pedido médium. Pero el small me quedó bien. Muy recomendada.
Trustpilot
2 weeks ago
2 days ago