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Thermal Underwear, Long underwear, or Long Johns

Maybe you're an avid extreme winter mountain trekker or you simply get the chills while working in the cool office, you operate heavy mining equipment year round or you work for the US Coast Guard. Either way, thermal long underwear, also known as base layer or long johns, may be just what you need to stay warm and comfortable. The type you choose will depend on your activity level, your budget, and the temperature.

Men's Thermal Underwear Women's Thermal Underwear Kid's Thermal Underwear

Thermal Underwear

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Items 1 to 20 of 59 total

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  1. Coldpruf Performance Merino Wool Blend Ski Thermal Top for Men

    • Hi Performance Wicking Thermals • Midweight Thermal Fabric • Wicks sweat and dries fast • Keeps your skin dry • Tagless • Ribbed Cuffs • Longer tail stays tucked in better • Flatlock Seams • 100% Polyester Inside / 70% Polyester,30% Merino Wool Outside
    $24.99
  2. Coldpruf Performance Merino Wool Blend Ski Thermal Bottom for Men

    • Hi Performance Wicking Thermals • Midweight Thermal Fabric • Wicks sweat and dries fast • Keeps your skin dry • Tagless • Ribbed Cuffs • Longer tail stays tucked in better • Flatlock Seams • 100% Polyester Inside / 70% Polyester,30% Merino Wool Outside
  3. Avalanche Women's Mogul Zip Neck

    • Base Layer; next to skin fabric • Provides thermal insulation • Body-hugging 4-way stretch privdes unrestricted movement • Quick absorption; keeps your skin dry • Highly breathable, allows moisture vapor to escape • Warmth without the weight or bulk • Machine washable

    Regular Price: $52.99

    Special Price $34.00

  4. Heavy Weight Fleece Polypropylene Thermal Underwear Pant for Adult

    • Thermal Underwear Drawer Bottom Pants • Our Warmest Thermal Underwear Product! • Comfortable on skin due to 100% polypropylene with nice terry finish • Thick but lightweight material wicks sweat and moisture extremely well • Fast drying • Genuine U.S. Military Issue Polypropylene Thermals, a vital part of the Extended Cold Weather Clothing System(ECWCS) • Perfect for staying warm and dry during outdoor cold weather activities • Not the best looking or highest quality but they are sure to keep you warm • Available in black or brown and sizes ranging from adult small through adult 3X • We offer price discounts for bulk orders. Please call for details.
    $20.95
  5. Youth Quest Performance Thermal Shirt

    • Single Layer Engineering • ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness • Controls odor and inhibits bacterial growth on fabric • Wicks and aids in moisture evaporation • Brushed inside for warmth and comfort • 85% Microfiber Polyetser • 15% Spandex • Fabric Weight: 6.5 oz. • Drop Shoulder Design • Self Fabric Cuffs • Tagless, Flat Seams offer added comfort

    Regular Price: $16.99

    Special Price $12.99

  6. Youth Quest Performance Thermal Pant

    • Single Layer Engineering • ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness • Controls odor and inhibits bacterial growth on fabric • Wicks and aids in moisture evaporation • Brushed inside for warmth and comfort • 85% Microfiber Polyetser • 15% Spandex • Fabric Weight: 6.5 oz. • Drop Shoulder Design • Self Fabric Cuffs • Tagless, Flat Seams offer added comfort

    Regular Price: $16.99

    Special Price $12.99

  7. Coldpruf Single Layer 100% Polypropylene Long Underwear Top for Men

    • Polypro retains more heat than any other fabric • Polypro dries extremely fast • Flatlock Seams • Tagless • Ribbed Cuffs • Extended tail stays tucked in • 100% Polypropylene

    Regular Price: $17.99

    Special Price $15.99

  8. Coldpruf Single Layer 100% Polypropylene Long Underwear Pant for Men

    • Polypro retains more heat than any other fabric • Polypro dries extremely fast • Flatlock Seams • Tagless • Ribbed Cuffs • Extended tail stays tucked in • 100% Polypropylene

    Regular Price: $17.99

    Special Price $15.99

  9. Indera Mills 100% Cotton Military Heavyweight Thermal Underwear Shirts for Men

    • Raschel Knit Thermal Fabric • Traps and retaint maximum heat • Rated for extreme cold • Heaviest weight available • Made for US Armed Forces • Elastic waistband • 9.5oz 100% cotton
    $14.99
  10. 100% Cotton Military Heavyweight Thermal Underwear Drawers for Men by Indera Mills

    • Raschel Knit Thermal Fabric • Traps and retaint maximum heat • Rated for extreme cold • Heaviest weight available • Made for US Armed Forces • Elastic waistband • 9.5oz 100% cotton
    $14.99
  11. 100% Pure Merino Wool Medium-Weight Crew Neck Women's Top

    • Brand: Minus33 100% Merino Wool Base Layer • Women's Crew Neck Long Underwear Shirt • For cold to very cold weather conditions • 100% 18.5 Micron Merino Wool • 230 g/m2 interlock knit construction • Flat lock designed seams to prevent chafing • Friendly for machine wash and dry • X-Small to 3X-Large Women’s Sizes • Large Garment Weight is 8.32 oz (235 grams) • Style #804 • Color: Black

    Regular Price: $64.99

    Special Price $56.49

  12. 100% Pure Merino Wool Medium-Weight Long Underwear Bottom for Women

    • Brand: Minus33 100% Merino Wool Base Layer • Women's Long Underwear Pant • For cold to very cold weather conditions • 100% 18.5 Micron Merino Wool • 230 g/m2 interlock knit construction • Flat lock designed seams to prevent chafing • Friendly for machine wash and dry • X-Small to 3X-Large Women’s Sizes • Large Garment Weight is 9.3 oz. (263 grams) • Style #803 • Color: Black

    Regular Price: $64.99

    Special Price $56.49

  13. Indera Mills Lightweight Ribbed Knit 100% Cotton Thermal Shirt For Men for Men

    • Preshrunk • Ribbed Knit(like a regular cotton T) • Bright white color • Rated for mild cold • 5.5oz 100% cotton
    $12.99
  14. Indera Mills Lightweight Ribbed Knit 100% Cotton Thermal Bottom For Men

    • Preshrunk • Ribbed Knit(like a regular cotton t) • Bright white color • Elastic waistband • Rated for mild cold • 5.5oz 100% cotton
    $12.99
  15. Indera Mills Color Dyed Cotton Polyester Blend Waffle Knit Thermal Top for Men

    • Waffle Knit • Traps body heat and retains it • Ribbed Cuffs • Polyester blend dries quicker than 100% cotton • 65% cotton/35% polyester
    $10.00
  16. Indera Mills 100% Cotton Medium Weight Waffle Knit Thermal Bottoms for Men

    • Ankle length • Medium Weight 6.5 oz Fabric • Waffle Knit • Ribbed Cuffs • Elastic Waistband • Rated for Very Cold Temps • 100% Cotton
  17. Indera Mills 100% Cotton Medium Weight Waffle Knit Thermal Shirts for Men

    • Medium Weight 6.5 oz Fabric • Waffle Knit • Ribbed Cuffs • Rated for Very Cold Temps • 100% Cotton
  18. Heavy Weight Fleece Polypropylene Thermal Underwear Crew Neck Top for Adult

    • Crew Neck Thermal Underwear Top • Our Warmest Thermal Underwear Product! • Comfortable on skin due to 100% polypropylene with nice terry finish • Thick but lightweight material wicks sweat and moisture extremely well • Fast drying • Genuine U.S. Military Issue Polypropylene Thermals, a vital part of the Extended Cold Weather Clothing System(ECWCS) • Perfect for staying warm and dry during outdoor cold weather activities • Not the best looking or highest quality but they are sure to keep you warm • Available in black or brown and sizes ranging from adult small through adult 3X • We offer price discounts for bulk orders. Please call for details.
    $20.95
  19. Heavy Weight Fleece Polypropylene Thermal Underwear Turtle Neck Top for Adult

    • Turtle Neck Thermal Underwear Top • Our Warmest Thermal Underwear Product! • Comfortable on skin due to 100% polypropylene with nice terry finish • Thick but lightweight material wicks sweat and moisture extremely well • Fast drying • Genuine U.S. Military Issue Polypropylene Thermals, a vital part of the Extended Cold Weather Clothing System(ECWCS) • Perfect for staying warm and dry during outdoor cold weather activities • Not the best looking or highest quality but they are sure to keep you warm • Available in black or brown and sizes ranging from adult small through adult 3X • We offer price discounts for bulk orders. Please call for details.
    $22.95
  20. Coldpruf Midweight 2 Layer Merino Wool Blend Long Underwear Top for Men

    • Midweight 2 Layer Thermal Fabric • Super soft next to skin • Traps and retains natural body heat • Tagless • Flatlock Seams • 100% Cotton Inside / 65% Cotton,25% Merino Wool,10% Nylon Outside

    Regular Price: $28.00

    Special Price $16.99

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Items 1 to 20 of 59 total

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