Thermal Underwear for Men Long Johns with Fleece Lined Base Layer Men Cold Weather Top Bottom

I grabbed these WEERTI thermal long johns for cold days and they’ve honestly become my default base layer once the temps drop. The inside fleece is very soft and cozy, and the fabric has enough stretch that I can move around, bend, and sit without feeling restricted or like the seams are fighting me. They fit close to the body, more like a second skin, which helps keep warmth in, but it also means you may want to size up if you’re between sizes or don’t like anything too tight. I’ve worn them under jeans and work pants outside and also just as loungewear at home, and they’ve kept me warm without getting overly sweaty thanks to the moisture‑wicking fabric. ​ They’re not perfect, though. The waistband and cuffs can feel a little snug after a full day, and if you run hot or spend a lot of time indoors, you might find yourself getting warmer than you’d like. The material is synthetic, so if you’re used to merino wool base layers, this won’t feel as “premium,” but for the price it’s hard to complain. Overall, these are a solid, comfortable option for everyday winter wear, especially if you just need something dependable for walking the dog, commuting, or working outside in the cold. ​

These WEERTI thermal base layer underwear is by far the best base layers I have ever purchased. Perhaps they have been too good because I always wear the top under my flannels as I work in an unfinished part of my house that does not have central heating for a few days a week. I meant them to be for running outside in the mornings, but they are just so comfortable. Both top and bottom are super comfortable and super warm. I saw a review when deciding to purchase these around a year ago that complained about the material balling up from the fabric w/ wear and wash. I have seen that too and I don't care because they are sooo comfortable and get the job done whether for running or athletics outside (snowboarding) or for just being around the house w/ the heat turned down low. Thanks WEERTI!

I tried on the shirt and I did not want to take it off. It’s super comfortable and made me feel relaxed instantly. The material is really nice. Seems to fit true-to-size. It’s thin but the inside really makes you warm. I was pleasantly surprised cuz of how thin it is but works great for wearing it under clothes.

Product-wise, this underwear set fits the bill! Feels comfortable, the inner polyester material feels warm, fit great even under a pair of looser jeans (not so sure how they would fit under skinny jeans lol). Size-wise, definitely go at least one size SMALLER than you would normally get. I think the size chart is misprinted, I believe the waist size is listed as the chest size, which will definitely throw you off. I actually went two sizes down from a Medium to an Extra Small, because I wanted to make sure the top and bottom of the underwear set would hug closer to my skin for heat retention, and they don't feel too tight after the 1st couple of times wearing them! Price-wise, I think it's fairly reasonable for the quality and performance the underwear set provides, and compares to most of the long underwear sets I researched on Amazon. 4 out of 5 stars is my honest rating, and I would certainly buy another pair in the future.

Kept me warm in the windy Scottish Highland winter. It fits well and feels nice and soft. Not constricting at all.

I am 6'1" and 245 lb and got myself 3XL (XXXL) and fit perfect. Feels perfect and also does the job perfect for me. Please don't hate me but I am a CA bike rider and for us in here when weather goes below 50F we feel like exploring Antarctica on our bikes. I've worn these during a trip here in CA and for a few hrs I was exposed to 42F weather and didn't shiver nor sweating. But I was comfortably warm under just atypical motorcycle jacket (not a very high quality) and a thin layer of turtle neck made out of a light material. So it may not be the best one in the world but definitely the best one for the money! Again, if you're riding in North Dakota winters it may not be sufficient for you but it is great as a base layer that helps you to stay warmer in 40F kind of weather at 70 mph on a bike!

Best thermals I've owned. These are like a second skin. I don't feel them but I notice the warmth. Lightweight and with the fleece lining, no more itch from waffle or fabric like the others I wear. I Bought 1 pair to check out, just ordered 2 more sets. I did order a size up and glad I did. fit perfect.

I got these for my son who is going on a camping trip in North Carolina and they he said they kept them very warm and fit him well he is 511 and weighs about 165 pounds athletic belt