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Thermajohn

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

  • Based on 52,132 reviews
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Availability: In Stock.
Fulfilled by Jackies Toys
Arrives Thursday, Feb 12
Order within 14 hours and 22 minutes
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Size: Large


Color: Grey


Description

Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (Medium, Navy)

Package Dimensions ‏ : ‎ 12.32 x 9.37 x 2.17 inches; 14.07 ounces


Department ‏ : ‎ mens


Date First Available ‏ : ‎ November 23, 2015


Manufacturer ‏ : ‎ Thermajohn


Product Warranty: For warranty information about this product, please click here


Best Sellers Rank: #717 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #14 in Men's Thermal Underwear Bottoms


#14 in Men's Thermal Underwear Bottoms:


Customer Reviews: 4.6 4.6 out of 5 stars (56,799)


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If you place your order now, the estimated arrival date for this product is: Thursday, Feb 12

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Top Amazon Reviews

    • Warmth Without the Bulk
Size: Medium Color: Grey
Warmth Without the Bulk This Thermajohn thermal underwear set has been an excellent base layer for cold weather. The fleece lining feels soft and adds a good layer of insulation without being too thick or heavy. I wore it under jeans and a hoodie on a chilly morning walk, and it kept me comfortably warm without overheating once I was moving around. The material has just enough stretch to allow easy movement, and the fit feels true to size for an XL—snug but not restrictive. What I especially like is that the set is lightweight yet traps warmth well, so it doesn’t feel like I’m bundled up. The fabric also seems to wick away sweat decently, which helps keep things comfortable if you’re active outdoors. After a wash cycle, it held its shape and softness, no pilling or shrinking noted. Something to keep in mind is that while this works great as a base layer, it’s not intended to be worn on its own in really cold temps—you’ll still want an outer layer. Also, the top is a bit longer, which helps keep it tucked in but may feel extra for some. Bottom line: A reliable, comfortable, and warm thermal set that’s perfect as a base layer for cold weather activities or just keeping cozy indoors. ... show more
Reviewed in the United States on September 25, 2025 by Everyday Reviews
    • Great buy - keeps you warm and cozy!
Size: X-Large Color: Black
My husband say they are impressively warm without feeling bulky. The fabric is soft, stretchy, and comfortable enough for all‑day wear, whether you’re outside in freezing temperatures or just trying to stay cozy indoors. They wick moisture well and hold their shape after washing, which makes them a reliable winter staple. A solid choice if you want affordable thermal layers that actually perform. ... show more
Reviewed in the United States on January 7, 2026 by Katie M.
    • Great base layer
Size: X-Large Color: Black
Great base layer! We bought for a recent trip to Alaska and it kept my husband warm on the colder days of our trip. We haven’t had any issues with shrinkage with washing so far. Good tight fit for pairing under other clothing.
Reviewed in the United States on January 15, 2026 by Jillian
    • size arms length too short ,dont reach wrist. 2 inches too short
Size: Medium Color: Grey
very good quality. thin and warm,not too warm. size is too small,would buy xtra large next time. no bulkyness . medium tight to skin and sleeves too short. very comfortable.
Reviewed in the United States on January 7, 2026 by MIKE K
    • Very comfortable
Size: Large Color: Black
I am very happy with the purchase of these long Johns . They fit true to size and will stretch if need be. I put them on and could feel my legs warming up right away. Worth the money.
Reviewed in the United States on January 8, 2026 by viper
    • Soft, warm, and silky!
Size: Medium Color: Black
Feels soft and warm. Fits good and silky.
Reviewed in the United States on January 20, 2026 by J.K.
    • Great gift for dad
Size: XX-Large Color: Black
got this for my dad and he loves it. he says it fits him good, comfortable and keeps him warm all the time when he goes outside. it’s a little stretchy as well. he still wears it after a year.
Reviewed in the United States on December 7, 2025 by finesse.des
    • Great product!
Size: Medium Color: Navy
Got these for my son as a Christmas present since he works outside doing construction. He absolutely loved them. Said they were very warm but not to the point of sweating and a comfortable fit that moved freely with motion without binding.
Reviewed in the United States on December 19, 2025 by Carla M.

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