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. Stay comfortable throughout your workday and leisure time. We carry many of your favorite brands like Guide Gear, WSI, Carhartt and more! Shop all Underwear and enjoy the lowest prices, guaranteed!

Related Products

Guide Gear Men's Lightweight Silk Base Layer Shirt, Long-Sleeve

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...
Was $34.99 Non-Member $29.99 Buyer's Club $26.99

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Guide Gear® Men's Lightweight Silk Base Layer Shirt, Long-Sleeve, 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!

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Men's Under Armour ColdGear EVO Base Layer Leggings

Item # WX2-592263

3 stars
(1)
  • Info

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

Was $74.99 Clearance $57.99

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Under Armour® ColdGear® EVO Scent Control Base Layer Leggings. The ultimate in warm, scent-stealthy, near-silent hunting gear.

Under Armour is the original moisture-wicking performance wear, favored by top athletes and hunters. As a base layer, it's unbeatable at keeping you at your best. Infrared fabric technology holds in heat without adding bulk. Scent-control tech keeps your scent under wraps.

Get into the best:


  • 87/13 polyester / elastane ColdGear fabric, with snugly supportive compression fit and moisture-wicking comfort
  • Brushed fabric stays quiet in the field
  • Infrared fabric technology locks in warmth without adding bulk
  • Scent-control technology masks you from your prey and lasts 10X longer than carbon
  • Flat-lock seams won't chafe
  • Antimicrobial to inhibit odor bacteria
  • Leggings have working fly
  • Machine wash / hang dry. Imported.

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

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Carhartt Force Super Cold Weather Thermal Underwear Pants, Black

Item # WX2-607670

5 stars
(17)
  • Info

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

Non-Member $44.99 Buyer's Club $40.49

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Carhartt Force® Super Cold Weather Base Layers. Huge warmth, with a moisture-wicking edge!

It may be C-O-L-D on the job, but that doesn't mean you won't perspire. Designed for men who work up a sweat even in frigid temps, Carhartt Force Long Underwear is the ultimate choice for comfortable layering.

Featuring FastDry® moisture-wicking technology and odor-fighting properties to keep you feeling fresh. Plus the tapered cuffs, elastic waist, and smooth flatlock seams provide top-notch, no-chafe comfort. Machine wash / dry. Imported.

State Size, as available in the Shopping Cart. Stay comfortable and fresh while you work up a lather.

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Carhartt® Base Force™ Cool Weather Weight Long Underwear Bottoms, Black

Item # WX2-427603

5 stars
(1)
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    Why are all sizes not listed? We only display sizes that are currently available for you to order.

Starting at...
Non-Member $34.99 Buyer's Club Pricing Applied at Checkout!

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Carhartt® Base ForceTM Cool Weather Weight Long Underwear Bottoms. Working up a sweat? Stay comfortable and fresh.

Wear these specially-treated, moisture-wicking Long Underwear Bottoms as a base layer when the temps are chilly, indoors or out.

Clocked in:
  • 4.5-oz. 100% polyester midweight knit
  • Force™ fabric wicks away moisture, has an antimicrobial finish so you stay fresh
  • Smooth flat lock seams for comfort
  • Comfortable tapered cuffs seal out chill
  • Elastic waist with Carhartt® logo printed on bottom hem
  • Carhartt Force logo printed on back
  • Machine wash / dry. Imported.

State Size, as available in the Shopping Cart.

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