Underwear & Base Layer

Save big on Men's 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! Shop all Underwear and enjoy the lowest prices, guaranteed!

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  1. 32 Degrees HEAT Base Layer Bottoms

    4 stars
    (16)
    Buyer's Club $13.49 Non-Member $14.99

    In Stock

  2. 32 Degrees HEAT Base Layer Crew-neck Top

    5 stars
    (13)
    Buyer's Club $13.49 Non-Member $14.99

    In Stock

  3. 6-Pk. of Guide Gear Camp Base Boxer Briefs, Camo

    5 stars
    (41)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $57.00

    In Stock

  4. 6-Pk. of Guide Gear Pouch Briefs, Camo

    5 stars
    (23)
    Buyer's Club $22.49 Non-Member $24.99 Compare at $42.00

    In Stock

  1. 2-Pk. of Guide Gear® Thermaweave Stretch Base Layer Pants

    3 stars
    (31)
    Clearance $19.99 Compare at $50.00

    In Stock

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Related Products

Men's Guide Gear Silk Base Layer Crewneck, Black

Item # WX2-208075

4 stars
(47)
  • 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

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Men's Guide Gear® Silk Base Layer Crewneck, 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. Imported.

  • 100% Silk
  • Lightweight fabric
  • Machine wash gentle cycle, tumble dry low.

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!

2-Pk. TRU-SPEC CORDURA Base Layer Boxer Briefs

Item # WX2-618726

  • Info

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

Buyer's Club $13.49 Non-Member $14.99

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2-Pk. TRU-SPEC® CORDURA® Base Layer Boxer Briefs. Defend your base!

No melt. No drip. No sweat. Put a layer of protection against your skin with one of the world's toughest undergarments.

Details:

  • CORDURA® 60/40 cotton / nylon fabric is no-melt / no-drip, and it absorbs more moisture and dries faster than 100% cotton
  • Won't melt or drip like polyester
  • Flat-lock seams for no-chafe comfort
  • Elastic waistband with gripper to secure your shirttail
  • Rib-knit hem
  • Machine wash / dry
  • Imported

State Size, as available in the Shopping Cart.

!!! Limited Quantities !!!

Carhartt® Heavyweight Cotton Thermal Long Underwear Bottoms

Item # WX2-427601

5 stars
(6)
  • 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!

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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!

Fox Tactical™ ECWCS Polypropylene Long Underwear Top

Item # WX2-296588

  • 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 $30.95

Add to Wishlist

Fox TacticalTM ECWCS Polypropylene Long Underwear Top: Extreme Cold Weather Clothing System.

Military-style "long johns", made in the USA from mil-spec 10.5-oz. 100% polypropylene, with fleece lining for extra warmth and comfort. For work or play in the winter cold, these can't be beat. Crew neck, rib-knit cuffs. Machine wash / dry. Imported.

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

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