The 10 Best Men's Long Underwear
We spent 26 hours on research, videography, and editing, to review the top choices for this wiki. Whether you live in an area that gets its fair share of cold weather each year or are planning on going skiing or hiking outside of the warmer months, you can ensure that you still stay toasty with something from our selection of men's long underwear. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best men's long underwear on Amazon.
10. Hanes X-Temp
The Hanes X-Temp feature a logoed elastic waist and a fabric mixture that adapts to your body temperature, warming you up or cooling you down when you need it. They are, however, only single layer underwear and not suited for severe cold climates.
- material feels smooth on your skin
- fit well in the crotch
- can feel loose around the knees
|Rating||3.6 / 5.0|
9. FiteX MAXHEAT
The FiteX MAXHEAT are made from an extra slick material that reduces friction between your top layer of clothing and the long johns. They feature a four-way stretch compression that makes the wearer look slimmer, but the ankles can be too loose.
- do not irritate more sensitive areas
- thin with strong heat retention
- shirt is too short for taller people
|Rating||4.0 / 5.0|
8. Ekouaer EK001372
The Ekouaer EK001372 are designed to keep you warm in severe weather conditions with their microfiber fleece lined cotton, making them suited for snowboarding, skiing and hiking. Plus they're available in sizes from S to 3XL.
- strong rear seams on seat sides
- safe to use an iron on
- can feel a bit heavy
|Rating||4.1 / 5.0|
7. CYZ Collection Long Johns
The CYZ Collection Long Johns feature a classic waffle knit and a perfect combination of cotton and polyester that makes them soft to the touch and durable. They are also shrinkage controlled for lasting size and shape retention.
- flat no rub seams
- make great pajama pants too
- do not resist wind
|Rating||3.6 / 5.0|
6. Duofold KMW2
The Duofold KMW2 are made from two-ply cotton, which is gentle on sensitive skin. The texture-rich knit traps air between two thermal layers, resulting in a chill-blocking barrier that keeps you comfortably warm without causing excessive sweat.
- elastic ankle cuffs keep air out
- good for use in below freezing temps
- look a bit bulky under clothes
|Rating||4.4 / 5.0|
5. Minus33 Merino Wool Kancamagus
The Minus33 Merino Wool Kancamagus are nice mid-weight long underwear that provide plenty of warmth without being too thick. Plus they are tagless so they won't itch, and have a stretch cuff around the ankles for added comfort.
- fire resistant fabric
- strong ultraviolet protection factor
- wear quickly in the washing machine
|Brand||Minus33 Merino Wool|
|Rating||4.2 / 5.0|
3. Carhartt Base Force
The Carhartt Base Force are made from material that wicks away sweat and weighs only 4.5 ounces. They feature smooth seams and gusseted inseams for a classic look, as well as a comfortable thick waistband that keeps the cold out.
- comfortably fit larger sized men
- perfect amount of stretch
- attractive fly design in the crotch
|Rating||4.9 / 5.0|
2. Tesla Blank Thermal
The Tesla Blank Thermal is a great value at under $20, and includes both bottoms and a long sleeve top. It will keep your entire body warm. The combination offers excellent insulation and a four-way thermal stretch for unrestricted movement.
- top and bottoms are fleece lined
- don't look bulky beneath clothes
- get softer with each wash
|Rating||4.7 / 5.0|
1. Smartwool NTS Mid 250
The Smartwool NTS Mid 250 feature a mid-rise waist to keep more of the torso warm, and flatlock seam construction designed to eliminate chafing. They are so warm that they can be worn as a single layer in cool weather or as a base layer in cold weather.
- naturally repel odors
- fabric dries quickly
- fit follows contours of the body
|Rating||4.7 / 5.0|