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Thermal Underwear

Thermal underwear (aka long johns) from Duofold and Carhartt deliver superior insulation, moisture management and comfort to all outdoor enthusiasts. Duofold and Carhartt long underwear are superior base layer underwear that keep you warm and comfortable in the toughest conditions.
   79 items (showing 1 to 30)    Page 1 of 3       1  2  3    Next >>     Show All
Carhartt Men's Heavyweight Cotton Thermal Crew Neck Top-IRREGULAR K228IRR
Carhartt Men's Heavyweight Cotton Thermal Crew Neck Top-IRREGULAR
K228IRR
Carhartt's superior comfort, warmth and durability, our heavyweight cotton thermal crew neck top is built with fabric that is 30% heavier....
Save 38%
Retail price $29.00
Our price $22.99
Sale price $17.99
  Available colors
       Black


Big and Tall sizes available
 
Carhartt Men's Heavyweight Cotton Thermal Bottom-IRREGULAR K229IRR
Carhartt Men's Heavyweight Cotton Thermal Bottom-IRREGULAR
K229IRR
With fabric that is 30% heavier than most other thermals, our heavyweight cotton thermal bottom helps keep you warm no matter how long you remain outside...
Save 38%
Retail price $29.00
Our price $22.99
Sale price $17.99
  Available colors
       Black


Big and Tall sizes available
 
Carhartt Midweight Cotton Union Suits - Irregular K226IRR
Carhartt Midweight Cotton Union Suits - Irregular
K226IRR
The Carhartt Union Suit is a one-piece undergarment that keeps you warm, top and bottom. It's made of 100% comfortable, easy-breathing 8 oz. cotton....
Save 45%
Retail price $42.00
Our price $36.99
Sale price $22.99
  Available colors
       Red

 
Carhartt Men's Base Force Cool Weather Weight Bottom 100642
Carhartt Men's Base Force Cool Weather Weight Bottom
100642
NEW from Carhartt. Carhartt's Base Force cool weather weight bottom...
Save 50%
Retail price $60.00
Our price$29.99
  Available colors
       Black


Big and Tall sizes available
 
Duofold Men's Mid Weight Two-Layer Thermal Top 400T
Duofold Men's Mid Weight Two-Layer Thermal Top
400T
This original mid-weight, two-layer thermal fabric features a blend of Merino wool and polyester for comfortable warmth in very cold weather during low...
Save 33%
Retail price $33.00
Our price$21.98
  Available colors
       Blue Jean


Big and Tall sizes available
 
Carhartt Men's Base Force Cool Weather Weight Crew Neck Top 100646
Carhartt Men's Base Force Cool Weather Weight Crew Neck Top
100646
NEW from Carhartt. When it's cold outside reach for Carhartt's cool weather weight crew neck top and stay warm....
Save 50%
Retail price $60.00
Our price$29.99
  Available colors
       Black


Big and Tall sizes available
 
 
Minus33 Men's Chocorua Midweight Crew 705
Minus33 Men's Chocorua Midweight Crew
705
The finest of Merino Wool is put through Minus33's special process to create a garment that is washable, dryable, soft and supple....
Save 15%
Retail price $65.00
Our price$55.49
  Available colors
       Black
       True Red
       FOREST GREEN
       Charcoal Grey


Big and Tall sizes available
 
Minus33 Men's Kancamangus Midweight Bottoms 706
Minus33 Men's Kancamangus Midweight Bottoms
706
Minus33 Merino Wool Thermal Bottom The finest of Merino Wool is put through our special process to create a garment that is washable, dryable and so...
Save 15%
Retail price $65.00
Our price$55.49
  Available colors
       Charcoal Grey
       Denim Heather
       FOREST GREEN
       True Red
       Black


Big and Tall sizes available
 
Duofold Women's Varitherm Base-Weight Long Sleeve Crew KTR3
Duofold Women's Varitherm Base-Weight Long Sleeve Crew
KTR3
Duofold Women's Varitherm long sleeve crew. Lightweight base layer designed for the outdoor athlete....
Save 20%
Retail price $25.00
Our price$19.99
  Available colors
       Black

 
Duofold Women's Varitherm Base-Weight Ankle Length Bottom KTR4
Duofold Women's Varitherm Base-Weight Ankle Length Bottom
KTR4
Duofold Women's Varitherm ankle length bottom. Lightweight base layer designed for the outdoor athlete....
Save 20%
Retail price $25.00
Our price$19.99
  Available colors
       Black

Duofold Men's Varitherm Base-Weight Long Sleeve Crew KTR1
Duofold Men's Varitherm Base-Weight Long Sleeve Crew
KTR1
Duofold Varitherm long sleeve crew. Lightweight base layer designed for the outdoor athlete....
Save 20%
Retail price $25.00
Our price$19.99
  Available colors
       Black

Carhartt Men's Midweight Cotton Union Suits K226
Carhartt Men's Midweight Cotton Union Suits
K226
The Carhartt Union Suit is a one-piece undergarment that keeps you warm, top and bottom. It's made of 100% comfortable, easy-breathing 8 oz. cotton and...
Save 24%
Retail price $42.00
Our price $36.99
Sale price $31.99
  Available colors
       Red

 
Carhartt Men's Base Force Cold Weather Weight Bottom 100643
Carhartt Men's Base Force Cold Weather Weight Bottom
100643
NEW from Carhartt. Carhartt's Base Force cool weather weight bottom....
Save 33%
Retail price $60.00
Our price$39.99
  Available colors
       Black


Big and Tall sizes available
 
Duofold Men's Mid Weight Two-Layer Thermal Bottom 400B
Duofold Men's Mid Weight Two-Layer Thermal Bottom
400B
This original mid-weight, two-layer thermal fabric features a blend of Merino wool and polyester for comfortable warmth in very cold weather during low...
Save 27%
Retail price $30.00
Our price$21.98
  Available colors
       Blue Jean


Big and Tall sizes available
 
Duofold Women's Mid Weight Two-Layer Thermal  Bottom 401B
Duofold Women's Mid Weight Two-Layer Thermal Bottom
401B
This originals mid-weight, two-layer fabric features a blend of Merino wool and polyester for comfortable warmth in very cold weather during low...
Save 27%
Retail price $30.00
Our price$21.98
  Available colors
       Winter White

 
Duofold Men's  Varitherm  Mid-Weight Ankle Length Bottom 470B
Duofold Men's Varitherm Mid-Weight Ankle Length Bottom
470B
Mid-weight, jersey knit fabric provides ultimate moisture management and warmth for high activity in cold weather. Odor resistant fabric 360...
Save 15%
Retail price $26.00
Our price$21.99
  Available colors
       Black


Big and Tall sizes available
 
Minus33 Men's Acadian Lightweight Boxer Brief 702
Minus33 Men's Acadian Lightweight Boxer Brief
702
Minus 33 Mens Acadian Boxer Briefs are lightweight and breathable. An undergarment for year round comfort....
Save 12%
Retail price $34.00
Our price$29.99
  Available colors
       Zephyr Green
       Azure Blue
       Black

Minus33 Men's Algonquin Lightweight Short Sleeve Crew 703
Minus33 Men's Algonquin Lightweight Short Sleeve Crew
703
The Minus 33 Algonquin, a lightweight 100% Merino wool tee, is so versatile by allowing temperature regulation and natural wicking properties....
Save 15%
Retail price $55.00
Our price$46.99
  Available colors
       Black
       True Red
       FOREST GREEN
       Charcoal Grey
       Denim Heather
       Azure Blue
       Zephyr Green

 
Duofold Men's Varitherm Expedition Weight Long Sleeve Crew KEW1
Duofold Men's Varitherm Expedition Weight Long Sleeve Crew
KEW1
Duofold Varitherm long sleeve crew. Expedition weight for high-activity protection....
Save 13%
Retail price $40.00
Our price$34.99
  Available colors
       Black

Minus33 Men's Katmai 100% Wool Expedition Weight Bottoms 709
Minus33 Men's Katmai 100% Wool Expedition Weight Bottoms
709
100% Merino Wool bottoms. Super comfortable and superior performance in the cold....
Save 15%
Retail price $95.00
Our price$80.99
  Available colors
       Black

Minus33 Men's Kobuk Expedition 1/4 Zip 723
Minus33 Men's Kobuk Expedition 1/4 Zip
723
Minus33 Merino Wool Kobuk Thermal 1/4 Zip. An extremely warm, comfortable, and durable garment....
Save $15
Retail price $100.00
Our price$84.99
  Available colors
       Black

 
Minus33 Merino Wool Expedition Balaclava 740
Minus33 Merino Wool Expedition Balaclava
740
Get maximum warmth and look great wearing a Minus33 Expedition balaclava. A stylish accessory for men or women....
Save 13%
Retail price $30.00
Our price$25.99
  Available colors
       Black

Minus33 Women's Tanana Expedition Crew Neck 807
Minus33 Women's Tanana Expedition Crew Neck
807
Minus33 803 Women's Tanana Expedition Crew. A product suitable for the coldest climates....
Save 15%
Retail price $95.00
Our price$80.99
  Available colors
       Black

Minus33 Women's Kenai Expedition Bottoms 809
Minus33 Women's Kenai Expedition Bottoms
809
Minus33 Women's Kenai Expedition Bottoms. A product suitable for the coldest climates. Super comfortable and superior performance in the cold....
Save 15%
Retail price $95.00
Our price$80.99
  Available colors
       Black

 
Carhartt Men's Base Force Super-Cold Weather Quarter -Zip Top 101301
Carhartt Men's Base Force Super-Cold Weather Quarter -Zip Top
101301
NEW from Carhartt. Carhartt's Base Force Super-Cold Weather Quarter-Zip top....
Save 17%
Retail price $60.00
Our price$49.99
  Available colors
       Black


Big and Tall sizes available
 
Carhartt Men's Heavyweight Cotton Thermal Bottom K229
Carhartt Men's Heavyweight Cotton Thermal Bottom
K229
With fabric that is 30% heavier than most other thermals, our heavyweight cotton thermal bottom helps keep you warm no matter how long you remain outside...
Save 33%
Retail price $30.00
Our price $24.99
Sale price $19.99
  Available colors
       Black


Big and Tall sizes available
 
Coldpruf Men's Expedition Performance Fleece Base Layer Bottom 85BOT
Coldpruf Men's Expedition Performance Fleece Base Layer Bottom
85BOT
COLDPRUF® Base Layer products offer warmth and comfort in all cold weather environments, whether you are at home, on the job, or outdoors....
Save 31%
Retail price $26.00
Our price$17.99
  Available colors
       Black


Big and Tall sizes available
 
 
Coldpruf Men's Expedition Fleeced Base Layer Long Sleeve Crew Neck Top 85TOP
Coldpruf Men's Expedition Fleeced Base Layer Long Sleeve Crew Neck Top
85TOP
COLDPRUF® Base Layer products offer warmth and comfort in all cold weather environments, whether you are at home, on the job, or outdoors....
Save 31%
Retail price $26.00
Our price$17.99
  Available colors
       Black


Big and Tall sizes available
 
Coldpruf Men's Authentic Wool Plus Dual Layer Base Layer Bottom 92BOT
Coldpruf Men's Authentic Wool Plus Dual Layer Base Layer Bottom
92BOT
COLDPRUF® Base Layer products offer warmth and comfort in all cold weather environments, whether you are at home, on the job, or outdoors....
Save 17%
Retail price $29.00
Our price$23.99
  Available colors
       Oatmeal


Big and Tall sizes available
 
Coldpruf Men's Authentic Wool Plus Dual Layer Long Sleeve Base Layer Top 92TOP
Coldpruf Men's Authentic Wool Plus Dual Layer Long Sleeve Base Layer Top
92TOP
COLDPRUF® Base Layer products offer warmth and comfort in all cold weather environments, whether you are at home, on the job, or outdoors....
Save 17%
Retail price $29.00
Our price$23.99
  Available colors
       Oatmeal


Big and Tall sizes available
 
 
   79 items (showing 1 to 30)    Page 1 of 3       1  2  3    Next >>     Show All

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