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!

Grid List
Sort By:
1-37 of 37
Show:
Pages:
  1. 1
1
  1. 6-Pk. Guide Gear Boxer Briefs

    5 stars
    (112)
    Compare at $38.00 Was $29.99 Non-Member $24.99 Buyer's Club $22.49

    You Save $15.51 (41%)

  2. 6-Pk. Guide Gear Pouch Briefs

    5 stars
    (90)
    Compare at $38.00 Was $24.99 Non-Member $19.99 Buyer's Club $17.99

    You Save $20.01 (53%)

  3. Guide Gear Performance T-shirt

     
    Compare at $25.00 Non-Member $14.99 Buyer's Club $13.49

    You Save $11.51 (46%)

  4. 6-Pk. of Guide Gear Camp Base Boxer Briefs, Camo

    5 stars
    (41)
    Compare at $57.00 Was $34.99 Non-Member $29.99 Buyer's Club $26.99

    You Save $30.01 (53%)

  1. 6-Pk. of Guide Gear Pouch Briefs, Camo

    5 stars
    (23)
    Compare at $42.00 Was $29.99 Non-Member $24.99 Buyer's Club $22.49

    You Save $19.51 (46%)

  2. Polar King Thermal Top

    3 stars
    (5)
    Clearance $19.99
  3. 32 Degrees HEAT Base Layer Bottoms

    4 stars
    (16)
    Clearance $14.99
  4. 32 Degrees HEAT Base Layer Crew-neck Top

    5 stars
    (14)
    Clearance $14.99
  1. 2-Pk. of Indera Mills Colored Thermal Long John Bottoms

    4 stars
    (28)
    Compare at $32.00 Was $24.99 Clearance $14.99

    You Save $17.01 (53%)

  2. Guide Gear 10-oz. Brown Poly-fleece Bottoms

    5 stars
    (69)
    Compare at $40.00 Was $39.99 Non-Member $19.99 Buyer's Club $17.99

    You Save $22.01 (55%)

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

    5 stars
    (72)
    Compare at $40.00 Was $24.99 Non-Member $19.99 Buyer's Club $17.99

    You Save $22.01 (55%)

  4. 2-Pk. of Indera Mills Colored Thermal Long John Tops

    4 stars
    (21)
    Compare at $32.00 Was $24.99 Clearance $14.99

    You Save $17.01 (53%)

  1. Men's Guide Gear Silk Base Layer Bottom, Black

    4 stars
    (54)
    Compare at $40.00 Was $34.99 Non-Member $29.99 Buyer's Club $26.99

    You Save $13.01 (33%)

  2. Under Armour ColdGear Infrared EVO Leggings

    4 stars
    (17)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!
  3. Under Armour ColdGear Infrared EVO Mock Turtleneck

    5 stars
    (21)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!
  4. Guide Gear® 10-oz. Poly-fleece Union Suit, Brown

    5 stars
    (71)
    Compare at $75.00 Was $34.99 Non-Member $29.99 Buyer's Club $26.99

    You Save $48.01 (64%)

  1. Carhartt Base Force Midweight Crew Top

     
    Non-Member $34.99 Buyer's Club $31.49
  2. 32 Degrees HEAT Heat Fleece Top

    5 stars
    (2)
    Clearance $14.99
  3. 32 Degrees HEAT Heat Fleece Bottoms

    4 stars
    (7)
    Clearance $19.99
  4. 2-Pk. of Guide Gear® Thermaweave Stretch Base Layer Tops

    4 stars
    (33)
    Compare at $50.00 Non-Member $29.99 Buyer's Club $26.99

    You Save $23.01 (46%)

  1. Carhartt Base Force Midweight Bottoms

     
    Non-Member $34.99 Buyer's Club $31.49
  2. Terramar Thermolator 1/2-zip Top

    5 stars
    (1)
    Non-Member $19.99 Buyer's Club $17.99
  3. Outdoor Research Sequence Leggings

     
    Non-Member $59.99 Buyer's Club Discount Applied at Checkout!
  4. Under Armour Base 2.0 Crew

    5 stars
    (4)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!
  1. Men's Guide Gear Silk Base Layer Crewneck, Black

    4 stars
    (47)
    Compare at $40.00 Was $34.99 Non-Member $29.99 Buyer's Club $26.99

    You Save $13.01 (33%)

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

    5 stars
    (1)
    Non-Member $44.99 Buyer's Club $40.49
  3. Carhartt Force Super Cold Weather Thermal Underwear Shirt, Black

    5 stars
    (1)
    Non-Member $44.99 Buyer's Club $40.49
  4. Under Armour® Base 3.0™ Leggings

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

    Item is currently on backorder

  1. Outdoor Research Sequence Long-sleeved Crew

     
    Non-Member $59.99 Buyer's Club Discount Applied at Checkout!
  2. Under Armour® Base 2.0™ Leggings

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

    Item is currently on backorder

  3. Carhartt® Irregular Base Force® Super PT Top

     
    Compare at $44.99 Was $29.99 Non-Member $24.99 Buyer's Club $22.49

    You Save $22.50 (50%)

    Item is currently on backorder

  4. Under Armour® Base 3.0™ Crew

    5 stars
    (1)
    Non-Member $74.99 Buyer's Club Discount Applied at Checkout!
  1. Carhartt® Heavyweight Crewneck Shirt

    5 stars
    (3)
    Non-Member $29.99 Buyer's Club Discount Applied at Checkout!
  2. Carhartt® Base Force™ Cold Weather Weight Crewneck Shirt, Black

     
    Non-Member $44.99 Buyer's Club Discount Applied at Checkout!
  3. Carhartt® Midweight Cotton Union Suit, Red

     
    Non-Member $39.99 Buyer's Club Discount Applied at Checkout!
  4. Carhartt® Base Force™ Cold Weather Weight Long Underwear Bottoms, Black

     
    Non-Member $44.99 Buyer's Club Discount Applied at Checkout!
  1. Carhartt® Base Force™ Cool Weather Weight Crewneck Shirt, Black

    5 stars
    (1)
    Non-Member $34.99 Buyer's Club Discount Applied at Checkout!
1-37 of 37
Show:
Pages:
  1. 1
1

Related Products

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

Item # W442C-219797

4 stars
(6)

WSI® Microtech Loose Long-sleeve Shirt. All-pro performance apparel that won't bust your salary cap.

Moisture wicking dryness and soft comfort for the high-priced talent on your squad! And unlike other big-name athletic apparel out there, WSI® gear won't bankrupt your franchise, so to speak. It's highly affordable, and pro athletes swear by it, for good reason... it performs.

Fabric is 100% polyester Microtech that wicks moisture and keeps warm down to 30°F. Loose fit. Crew neck. Made in the USA. Machine wash / dry.

State Size, as available in the Shopping Cart.

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

Item # WX2-307431

4 stars
(21)
  • Info

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

Compare at $32.00 Was $24.99 Clearance $14.99

You Save $17.01 (53%)

Add to Wishlist

Indera Mills® Performance Thermal Top is thick, comfortable and WARM. SAVE BIG BUCKS!

Supremely insulating! Since 1914 Indera Mills® has been making top-quality clothing to embrace the American lifestyle. It's all about creating medium-activity garments to keep you warm, goose-bump free and comfortable in the cold and extreme cold.

Whether you're trekking through the woods in search for your trophy on a frosty day, ice fishing or working a long shift outside in the dead of winter... you'll feel just right all day long with this name brand stuff. 

  • 65/35 cotton / polyester blend
  • Thermal knit traps and retains body heat
  • Full cut for a comfortable fit
  • Shrinkage controlled for lasting size and shape.

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

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.

Compare at $30.95 Non-Member $29.99 Buyer's Club $26.99

You Save $3.96 (13%)

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.

5.11 Tactical® Sports Boxer Brief

Item # WX2-230308

3 stars
(2)
  • Info

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

Non-Member $24.99 Buyer's Club Discount Applied at Checkout!

Add to Wishlist

5.11 Tactical® 9" Sports Boxer Brief Underwear Underwear that will stretch and move with you, for comfort while you run, bend, walk, or jog!

You'll say goodbye to your tighty-whities once you give these Sport Boxer Brief Underwear a try. Mens underwear made with a polyester / spandex blend, our briefs have great breathability and are comfortable and quick-drying. 5.11's Sport Boxer Brief Mens Underwear are the only briefs with moisture-moving 3D-Wicking technology. Machine wash / dry underwear. Imported.

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

Join or Renew The Sportsman’s Guide Buyer’s Club® Today!

$29.99 per year   • Save up to 10% on purchases every day.
Join Renew More Info