The 10 Best Men's Long Underwear

Updated December 15, 2016 by Brett Dvoretz

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
Brand Hanes
Model 25442
Weight 16 ounces
Rating 3.6 / 5.0


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
Brand FiteX
Model pending
Weight pending
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
Brand Ekouaer
Model EK001372
Weight pending
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
Brand CYZ Collection
Model pending
Weight pending
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
Brand Duofold
Model KMW2
Weight 16 ounces
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
Model 706
Weight 16 ounces
Rating 4.2 / 5.0

4. Saxx Fly Bottom

The Saxx Fly Bottom come in charming winter patterns, like snowflakes and reindeer, as well as classic black and rugged camouflage. They're made from ultra soft viscose, which breathes well and has a silky texture, plus they are designed to be extra long.
  • strong stitching will last for years
  • very comfortable for everyday wear
  • sizing is a bit off
Brand Saxx
Model SXLJ30F
Weight 16 ounces
Rating 4.1 / 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
Brand Carhartt
Model 101825
Weight 4 pounds
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
Brand blank
Model pending
Weight 3.2 ounces
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
Brand SmartWool
Model SW-NP605-$P
Weight 7.7 ounces
Rating 4.7 / 5.0

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Last updated on December 15, 2016 by Brett Dvoretz

A wandering writer who spends as much time on the road as behind the computer screen, Brett can either be found hacking furiously away at the keyboard or perhaps enjoying a whiskey and coke on some exotic beach, sometimes both simultaneously, usually with a four-legged companion by his side. He hopes to one day become a modern day renaissance man.

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