Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather

I never thought I’d be this emotionally attached to a pair of long johns, but here we are. The Thermajohn Thermal Underwear Set is like a warm hug from a teddy bear who also happens to be a professional insulation expert. Seriously—this fleece-lined base layer has no business being this cozy.I put them on during a cold snap and haven’t looked back since. I’ve worn them under jeans, joggers, and even pajama pants (don’t judge me). I’d wear them to work if I could. They’re warm but not bulky, stretchy without being saggy, and soft enough to make you question every other piece of clothing you own.Also, shoutout to the waistband for staying in place and not playing “let’s roll down every 10 minutes.” These long johns understood the assignment.If you’re looking to brave the cold while feeling like a warm cinnamon roll, these are it. Buy them. Your frozen thighs will thank you.

Bought this thermal set for my teenage son who’s spending a semester in a cold country, and he loves them! He’s 5'9", 175 lbs, and the medium fits him perfectly—snug but not too tight. The fleece lining is super soft and keeps him warm without being bulky. Great as a base layer under pants and hoodies. Definitely a must-have for cold climates or winter travel!

Bought these for a spring camping trip with 30 degree nights / 40 degree days & raining throughout. Kept me very warm - great base layer/layering. Very comfortable and soft, fits well. So glad I had them!

Very warm. I recommend these thermals for temperatures well below freezing. I was too warm skiing with these and one other thin layer at roughly 0 deg C. My only complaint is that the material showed signs of wear after just one use. Lots of raises fibers on the breast. It’s purely a cosmetic issue for now, so I can’t speak to the product’s longevity.

Went skiing and needed something warm. This did the trick and kept me almost sweating under my jacket and hoodie. Very warm and great quality! Super comfy and cleans easy.

Son does carts in the winter in MN so needed something warm to wear under clothes (because snow pants aren't cool). These were so nice I purchased a pair for myself too. Love the fleece lining, washes up well and doesn't shrink. Great value and functionality.

They are very firm fitting and they are very warm. I bought these to use under my pants and shirt for motorcycle riding in cooler temps. They work great and they are very comfortable:)

I always wear it under my clothes when it's cold.