A matching thermal top and bottom is handy for layering in cold weather.
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
This men's thermal long johns set is a seamless knit base layer: a long-sleeve crew-neck top and full-length pants, knitted in the round so there are no side seams to rub and no sewn elastic band to dig in. It goes on first and sits flat under jeans, work pants, bibs and ski pants.
Both pieces are knit from a nylon, polyester and spandex yarn, with denser ribbed zones and open knit areas mapped across the chest, back, shoulders, forearms and knees. Raglan sleeves give you a full reach overhead, ribbed cuffs hold the sleeves at the wrist and the legs at the boot top, and the waistband is knitted into the pants instead of sewn on.
Cotton long johns are the usual first try and the usual complaint, because cotton holds on to sweat from the walk in and turns cold once you stop moving. This set is a synthetic knit instead, close-fitting and stretchy, so it moves when you bend, kneel and reach and does not bunch at the knees when you sit.
Whether you are sitting in a deer stand at first light, working a winter shift outside or riding the lift all day, this set gives you warmth underneath with nothing to rub or dig in.
Key Features:
Activearo makes practical outdoor gear for the days you actually spend outside. This is the layer you pull on in the dark before a cold day and stop noticing once everything else goes on over it.
Pair it with our Fleece Lined Softshell Hunting Jacket and Fleece Lined Beanie for cold mornings in the stand.
Free shipping in the United States and the United Kingdom.
Check our Shipping Policy for more information.
If you decide to return the items for whatever reason you may do so within 30 days from the day that you received them. Read more in our Return and Refund Policy.
Overall rating: 4.6 / 5 from 5 reviews.
A matching thermal top and bottom is handy for layering in cold weather.
Amelia W. 5/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
The fitted shape looks easy to wear underneath everyday clothes. I'd check the size guide closely.
Ethan S. 4/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
Looks like a practical base layer for winter walks or working outside.
Chloe H. 5/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
I like that both pieces come as a set. More detail on the fabric weight would help.
Noah D. 5/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
Simple thermal design without extra bulk in the photos. Useful as a cold-weather layer.
Lily F. 4/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
Sizing can vary from piece to piece. If there's a size chart on the page, that's your best guide. Not sure, or between sizes? Email us your usual size or measurements and we'll point you to the right one. Quicker than guessing.
Yes. If it doesn't fit or isn't what you expected, send it back within 30 days of delivery for a refund or exchange.
Every piece is picked for real field use. Trail, water, and hunt, not the shelf. Check the specs on this page for the exact materials and features so you know what it's made for.
Ask us about fit, fabric, or specs, email info@activearo.com or use our contact page and a real person gets back to you.
Once it ships, you'll get a tracking link by email so you can follow your package the whole way. You can also track anytime at activearo.com/apps/parcelpanel with your order number.
Most of our apparel: machine wash cold, hang dry, skip the bleach and the iron. Always follow the care label on your specific item.
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Overall rating: 4.6 / 5 from 5 reviews.
A matching thermal top and bottom is handy for layering in cold weather.
Amelia W. 5/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
The fitted shape looks easy to wear underneath everyday clothes. I'd check the size guide closely.
Ethan S. 4/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
Looks like a practical base layer for winter walks or working outside.
Chloe H. 5/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
I like that both pieces come as a set. More detail on the fabric weight would help.
Noah D. 5/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants
Simple thermal design without extra bulk in the photos. Useful as a cold-weather layer.
Lily F. 4/5
Men's Thermal Long Johns Set - Seamless Base Layer Top and Pants