Underwear & Base Layer

Save big on Underwear at Sportsman's Guide. Every guy could use a couple new pairs of Boxers or Briefs and at Sportsman's Guide you can also choose from Thermal Long Underwear, Compression Shorts, Base Layers, Long Johns to name just a few. These Long Johns and Underwear are great for Outdoors activities. We carry many of your favorite brands like Guide Gear, WSI, Carhartt and more!

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  1. 2-Pk. of Indera Mills® Colored Thermal Long John Bottoms

    4 stars
    (23)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $32.00

    In Stock

  2. Guide Gear® 10-oz. Poly-fleece Union Suit, Brown

    5 stars
    (61)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $75.00

    In Stock

  3. Under Armour® ColdGear® Infrared EVO Mock Turtleneck

    5 stars
    (17)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  4. Guide Gear® 10-oz. Brown Poly-fleece Bottoms

    4 stars
    (64)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $40.00

    In Stock

  1. Under Armour® ColdGear® Infrared EVO Leggings

    4 stars
    (13)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  2. 2-Pk. of Indera Mills® Colored Thermal Long John Tops

    4 stars
    (17)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $32.00

    In Stock

  3. Men's Guide Gear® Kingsilk Bottoms, Black

    4 stars
    (43)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $40.00

    In Stock

  4. Polar King® Thermal Bottoms

     
    Buyer's Club $17.99 Non-Member $19.99

    In Stock

  1. 32 Degrees HEAT® Base Layer Bottoms

    5 stars
    (5)
    Buyer's Club $17.99 Non-Member $19.99

    In Stock

  2. Polar King® Thermal Top

    4 stars
    (2)
    Buyer's Club $17.99 Non-Member $19.99

    In Stock

  3. Guide Gear® 10-oz. Brown Poly-fleece Crew-neck Top

    5 stars
    (71)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $40.00

    In Stock

  4. Men's Guide Gear® Kingsilk Crew Top, Black

    4 stars
    (42)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $40.00

    In Stock

  1. 32 Degrees HEAT® Base Layer Crew-neck Top

    4 stars
    (4)
    Buyer's Club $17.99 Non-Member $19.99

    In Stock

  2. 2-Pk. of Guide Gear® Thermaweave Stretch Base Layer Tops

    4 stars
    (32)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $50.00

    In Stock

  3. Under Armour® Base 2.0™ Leggings

    4 stars
    (3)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  4. Under Armour® Base 3.0™ Leggings

     
    Non-Member $74.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  1. Under Armour® Base 2.0™ Crew

     
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  2. Under Armour® Base 3.0™ Crew

    5 stars
    (1)
    Non-Member $74.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  3. 2-Pk. of Guide Gear® Thermaweave Stretch Base Layer Pants

    3 stars
    (29)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $50.00

    In Stock

  4. 4 Hanes® Flannel Boxers

    4 stars
    (16)
    Buyer's Club $22.49 Non-Member $24.99 Compare at $40.00

    In Stock

  1. 32 Degrees HEAT® Heat Fleece Top

    5 stars
    (1)
    Buyer's Club $22.49 Non-Member $24.99

    In Stock

  2. Guide Gear® Kingsilk Balaclava, Black

    4 stars
    (11)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $30.00

    In Stock

  3. Guide Gear® 10-oz. Poly-fleece Balaclava, Brown

    4 stars
    (27)
    Buyer's Club $8.99 Non-Member $9.99 Compare at $25.00

    In Stock

  4. 32 Degrees HEAT® Heat Fleece Bottoms

    4 stars
    (2)
    Buyer's Club $22.49 Non-Member $24.99

    In Stock

  1. Carhartt® Irregular Base Force® Super PT Bottoms

     
    Buyer's Club $17.99 Non-Member $19.99 Compare at $44.99

    In Stock

  2. 6-Pk. Guide Gear® Boxer Briefs

    5 stars
    (102)
    Buyer's Club $22.49 Non-Member $24.99 Compare at $38.00

    In Stock

  3. Terramar® Thermolator Leggings

     
    Buyer's Club $26.99 Non-Member $29.99

    In Stock

  4. 6-Pk. Guide Gear® Pouch Briefs

    5 stars
    (79)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $38.00

    In Stock

  1. Carhartt Force® Super Cold Weather Thermal Underwear Shirt, Black

     
    Non-Member $44.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  2. Carhartt Force® Super Cold Weather Thermal Underwear Pants, Black

     
    Non-Member $44.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  3. Terramar® Thermolator 1/2-zip Top

     
    Buyer's Club $26.99 Non-Member $29.99

    In Stock

  4. Carhartt® Base Force Midweight Bottoms

     
    Non-Member $34.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  1. Carhartt® Base Force Midweight Crew Top

     
    Non-Member $34.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  2. 6-Pk. of Guide Gear® Camp Base Boxer Briefs, Camo

    5 stars
    (39)
    Buyer's Club $26.99 Non-Member $29.99

    In Stock

  3. 6-Pk. of Guide Gear® Pouch Briefs, Camo

    5 stars
    (23)
    Buyer's Club $22.49 Non-Member $24.99

    In Stock

  4. Outdoor Research® Sequence™ Long-sleeved Crew

     
    Non-Member $59.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  1. Outdoor Research® Sequence™ Leggings

     
    Non-Member $59.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  2. Carhartt® Irregular Base Force® Super Cold Weather Bottoms

    4 stars
    (2)
    Buyer's Club $22.49 Non-Member $24.99

    Item is currently on backorder

  3. Men's WSI® Arctic Microtech Long-sleeve Cold Weather Performance Shirt

    5 stars
    (2)
    Buyer's Club $35.99 Non-Member $39.99 Compare at $45.99

    In Stock

  4. Men's WSI® Microtech Fitted Long-sleeve Shirt

    3 stars
    (6)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $21.99

    In Stock

  1. Men's WSI® Arctic WikMax™ Pants, Black

    5 stars
    (1)
    Buyer's Club $44.99 Non-Member $49.99 Compare at $59.99

    In Stock

  2. Men's WSI® Compression Shorts

    2 stars
    (2)
    Buyer's Club $22.49 Non-Member $24.99 Compare at $27.99

    In Stock

  3. WSI® Microtech Neon Green Fitted Long-sleeved Shirt

    3 stars
    (1)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $21.99

    In Stock

  4. Men's WSI® WikMax HEATR® Pants, Black

     
    Buyer's Club $116.99 Non-Member $129.99 Compare at $139.99

    In Stock

  1. Men's WSI® Microtech Fitted Sleeveless Shirt

    4 stars
    (4)
    Buyer's Club $13.49 Non-Member $14.99 Compare at $17.99

    In Stock

  2. Men's WSI® Microtech Loose Long-sleeve Shirt, Black

    4 stars
    (6)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $25.99

    In Stock

  3. Men's WSI® Microtech Zipper Polo, Black

    3 stars
    (1)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $35.99

    In Stock

  4. Carhartt® Heavyweight Cotton Thermal Long Underwear Bottoms

    5 stars
    (4)
    Non-Member $29.99 Buyer's Club Discount Applied at Checkout!

    In Stock

1-48 of 55
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Related Products

3 New Dutch Military Surplus Fleece Long Underwear Bottoms

Item # WX2-590736

  • Info

    Why are all sizes not listed? We only display sizes that are currently available for you to order.

Buyer's Club $17.99 Non-Member $19.99

Add to Wishlist

3-Pk. of New Dutch Military Surplus Fleece Long Underwear.

Hey, Chilly Willy! When it's c-c-cold out, make sure you deploy an extra layer with these Bottoms to ward off Jack Frost "offensives."

  • Cotton-blend material
  • Comfortable elastic waist
  • Rib-knit ankle cuffs lock in warmth
  • Machine wash / dry
  • Imported

Condition: brand new, never issued. State Size, as available in the Shopping Cart. Recruit yours today!

!!! Limited Quantities !!!

Men's Guide Gear® Kingsilk Bottoms, Black

Item # WX2-208077

4 stars
  • Info

    Why are all sizes not listed? We only display sizes that are currently available for you to order.

Starting at...
Buyer's Club $26.99 Non-Member $29.99

Add to Wishlist

Guide Gear® Kingsilk Bottoms, BIG BUCKS OFF!

Ounce for ounce, silk is the warmest fabric there is. Naturally moisture wicking, dry and comfortable. Smooth surface won't catch or cling to clothing. Bottoms have an elastic waistband. Imported. Machine wash / hang dry.

State Size, as available in the Shopping Cart.

Built to Sportsman's Guide's exact specifications, Guide Gear® stands for dependability, long-lasting quality and unmatched value! Guaranteed!

Carhartt® Heavyweight Cotton Thermal Long Underwear Bottoms

Item # WX2-427601

5 stars
  • Info

    Why are all sizes not listed? We only display sizes that are currently available for you to order.

Starting at...
Non-Member $29.99 Buyer's Club Discount Applied at Checkout!

Add to Wishlist

Carhartt® Heavyweight Cotton Thermal Long Underwear Bottoms are up on warmth and comfort.

A base layer to wear under, on those days when jeans, khakis or work pants aren't enough to keep cold away. Made of 9.5-oz., moisture-wicking 100% ringspun cotton knit for softness and toastiness. Reinforced stitching on all seams means these wear long. Ribknit cuffs seal out chill. Elastic waist with Carhartt® logo. Machine wash / dry. Imported.

State Color and Size, as available in the Shopping Cart. Chill, out!

2-Pk. of Guide Gear® Thermaweave Stretch Base Layer Tops

Item # WX2-223857

4 stars
  • Info

    Why are all sizes not listed? We only display sizes that are currently available for you to order.

Buyer's Club $26.99 Non-Member $29.99 Compare at $50.00

Add to Wishlist

2-Pk. of Guide Gear® Thermaweave Stretch Base Layers form the perfect foundation of protection! SAVE BIG!

Every great trek begins with a solid foundation. Got some adventure on your to-do list? Guide Gear® Thermaweave Base Layer Gear is a great place to start. It's cool, comfortable and helps pull moisture away from the skin, preventing chafing and discomfort.

Flexible stretch fabric moves with you, ensuring that you'll never suffer creases or bunching. Get yours here and you'll be ready for any outdoor escapade!

Back to base:

  • 94/6 cotton / spandex blend
  • Crew-neck collar
  • Stretch-to-fit cuffs and comfort
  • Flat-seam stitching
  • Straight hem. Machine wash / lay flat to dry. Imported.

State Color and Size, as available in the Shopping Cart. Please order one size larger for a more comfortable fit.

Built to Sportsman's Guide's exact specifications, Guide Gear stands for dependability, long-lasting quality and unmatched value!  Guaranteed!

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