13 Best Men's Thermal Underwear

List Updated September 2022

Bestselling Men's Thermal Underwear in 2022


Fruit of the Loom Men's Classics Midweight Waffle Thermal Underwear Bottoms, Light Grey Heather, Medium

Fruit of the Loom Men's Classics Midweight Waffle Thermal Underwear Bottoms, Light Grey Heather, Medium
BESTSELLER NO. 1 in 2022
  • Warm waffle thermal bottoms for cold weather
  • Sturdy and durable construction
  • Wicks away moisture to keep you comfortable
  • Retains heat to keep you warm
  • Tag less elastic waistband

Duofold Men's Mid Weight Wicking Thermal Pant, Black, Large

Duofold Men's Mid Weight Wicking Thermal Pant, Black, Large
BESTSELLER NO. 2 in 2022
  • Classic 2-ply cotton-rich thermal underwear
  • Choose these base-layer bottoms for everyday warmth during low activity levels

Hanes Men's Big Red Label X-Temp Thermal Pant, Heather Grey, Medium

Hanes Men's Big Red Label X-Temp Thermal Pant, Heather Grey, Medium
BESTSELLER NO. 3 in 2022
  • Flat no rub seams
  • Shrinkage controlled
  • Soft waffle thermal fabric
  • Snug fitting - buy a size larger for a looser fit
  • Comfortable rib knit cuffs

Carhartt Men's Base Force Wicking Cotton Super Cold Weather Bottom,Black,Large

Carhartt Men's Base Force Wicking Cotton Super Cold Weather Bottom,Black,Large
BESTSELLER NO. 4 in 2022
  • Moisture-wicking legging featuring logoed-elastic waistband
  • If your inseam length falls between sizes, buy the longer size

Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set Fleece Lined (XX-Large, White)

Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set Fleece Lined (XX-Large, White)
BESTSELLER NO. 5 in 2022
  • 2 Piece thermal set they are ultra soft, warm, comfortable and great to wear at home or add an extra layer of warmth under your clothes.
  • Made from Ultra-Soft polyester and spandex, the four way stretch material provides a comfortable fit.
  • Perfect for indoor/outdoor winter activities.
  • 2 Pieces: Top and Bottom Included. Available in Black, Navy, Grey & White

BU-MHS100-BLK_Small Tesla Blank Men's Microfiber Fleece Lined Top & Bottom Set MHS100

BU-MHS100-BLK_Small Tesla Blank Men's Microfiber Fleece Lined Top & Bottom Set MHS100
BESTSELLER NO. 6 in 2022

Hanes X-Temp Men`s Thermal Pant, 14520, M, Black

Hanes X-Temp Men`s Thermal Pant, 14520, M, Black
BESTSELLER NO. 7 in 2022
  • 60% organic cotton/40% recycled polyester
  • Shrinkage controlled for lasting size and shape retention
  • Tag-free for itch-free comfort

Fruit of the Loom Men's Classics Midweight Waffle Thermal Underwear Crew Top (1 & 2 Packs), Natural, Medium

Fruit of the Loom Men's Classics Midweight Waffle Thermal Underwear Crew Top (1 & 2 Packs), Natural, Medium
BESTSELLER NO. 8 in 2022
  • Warm waffle thermal crew top for cold weather
  • Fits close to body as a thermal layering piece under clothes
  • Wicks away moisture to keep you comfortable
  • Retains heat to keep you warm
  • Tag less neckline

Duofold Men's Mid Weight Wicking Crew Neck Top, Black, X-Large

Duofold Men's Mid Weight Wicking Crew Neck Top, Black, X-Large
BESTSELLER NO. 9 in 2022
  • Cold weather, low-impact activities
  • Moisture control
  • Double-layer thermal for warmth in cold weather
  • Flat lock seams to avoid irritation

Men's Polyester Tagless Brush Lined Thermal Top & Bottom Underwear Set | No Fly, Gray, XL

Men's Polyester Tagless Brush Lined Thermal Top & Bottom Underwear Set | No Fly, Gray, XL
BESTSELLER NO. 10 in 2022

LAPASA Men's Lightweight Thermal Underwear Long John Set Fleece Lined Base Layer Top and Bottom (Large, Grey)

LAPASA Men's Lightweight Thermal Underwear Long John Set Fleece Lined Base Layer Top and Bottom (Large, Grey)
BESTSELLER NO. 11 in 2022
  • LAPASA men's thermal underwear set is made with micro-fleece fabric to give the ultimate warmth during the cold weather seasons.
  • Made of polyester and spandex blend, these thermal base layers are light for layering under other clothes.
  • This thermal underwear set is designed to give you flexibility by hugging your body and stretching to move with you, they will keep you warm without sacrificing your range of motion or comfort.
  • Snug fit ensures no bunching around your waistline or sleeves and reduces heat loss.
  • Shrinkage controlled for lasting size and shape retention.

ColdPruf Men's Basic Dual LayerBottom, Black, Medium

ColdPruf Men's Basic Dual LayerBottom, Black, Medium
BESTSELLER NO. 12 in 2022
  • Soft, cotton two-layer engineering traps body heat between layers resulting in chill-blocking warmth
  • Pant sits at natural waistline. Front and back rise provides an exceptionally comfortable fit and maintains coverage during various activities
  • Tagless labeling, non-itch waistband and gussets for added durability and comfortable fit
  • Convenient functioning front fly
  • Perfect as a base layer. Best for dressing with minimal layers in cold to very cold weather and low to medium activity levels

Rocky Men's Thermal 2pc Set Long John Underwear X-Large White

Rocky Men's Thermal 2pc Set Long John Underwear X-Large White
BESTSELLER NO. 13 in 2022
  • Recommend to order 1 size up for comfort fit Includes: Thermal 2pc set one (1) top and one (1) bottom 65% Cotton and 35% Polyester.Lightweight but warm. Convenient Fly front. Shrinkage controlled for lasting size and shape. Waffle knit retains body heat to keep you warm.
  • Waffle knit or Jersey Knit
  • Lightweight but warm. Thermal knit retains body heat to keep you warm.
  • Convenient Fly front
  • IMPORTANT NOTE: ROCKY BRANDED ITEMS ARE CUSTOM MADE AND SOLD BY "ROCKY FASHION" OTHER SELLERS MAY BE SELLING COUNTERFEIT ITEMS. PLEASE CHECK THE SELLER BEFORE YOU PLACE THE ORDER.

How to Buy Underwear that Fits

Buying underwear isn't really all that tough.

Since you can't try underwear on before you buy it (or you shouldn't, anyway) you have to be pretty spot on about your size when you are buying underwear. Underwear typically runs smaller than a pants size. I'm a size 00 in jeans, but most underwear in a size 5 (or small, as they also run) fit me just fine. I don't know why this is, but knowing that underwear runs smaller than the size claims can help you get a better fit. So, if you are normally a size 7 jean, underwear in a medium or large is your best bet. Men's underwear, however, seems to stay true to size in general, coming in small to extra large, without other sizes (like 5, 7, or 8) included.

If your underwear digs at your crotch, they are too small. If the elastic bags on your butt or thighs, they are too big. Most underwear in the waist will fit fine, but if your underwear is ill-fitting in other areas, or the underwear bags on your butt (wedgie alert!!!) you need to go up or down a size.

Boy shorts styles are usually a safe bet, since they are most form-fitting, and are cheaply bought. For guys, boxers or boxer-briefs are usually safe as well to purchase. The classic underwear design just holds too many what-ifs- what if they're too tight? Too high (go up to the belly button)? Too baggy in the butt? Stick to styles that are more figure-flattering overall and you'll get a better fit.

Stick to cotton underwear for overall genital health. Since your crotch sweats a lot, you want breathable material so your genitals can breathe. You don't need a sweaty, germy, bacterial mess down there. Cotton underwear is best overall, even if it is a bit too big or too small.

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