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. Polar King Thermal Bottoms

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

    In Stock

  2. 32 Degrees HEAT Base Layer Bottoms

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

    In Stock

  3. 32 Degrees HEAT Base Layer Crew-neck Top

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

    In Stock

  4. Polar King Thermal Top

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

    In Stock

  1. Under Armour ColdGear Infrared EVO Mock Turtleneck

    5 stars
    (21)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!

    In Stock

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

    4 stars
    (67)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $40.00

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

    4 stars
    (51)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $40.00

    In Stock

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

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

    In Stock

  2. Under Armour ColdGear Infrared EVO Leggings

    4 stars
    (16)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  3. Men's Guide Gear Silk Base Layer Crewneck, Black

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

    In Stock

  4. Under Armour Base 2.0 Crew

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

    In Stock

  1. 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

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

    5 stars
    (69)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $75.00

    In Stock

  3. 6-Pk. Guide Gear® Boxer Briefs

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

    In Stock

  4. Carhartt® Irregular Base Force® Super PT Bottoms

    4 stars
    (2)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $44.99

    In Stock

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

    4 stars
    (28)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $32.00

    In Stock

  2. 6-Pk. Guide Gear Pouch Briefs

    5 stars
    (89)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $38.00

    In Stock

  3. 2-Pk. of Indera Mills Colored Thermal Long John Tops

    4 stars
    (21)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $32.00

    In Stock

  4. Under Armour® Base 3.0™ Crew

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

    In Stock

  1. 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

  2. 32 Degrees HEAT Heat Fleece Bottoms

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

    In Stock

  3. 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

  4. 32 Degrees HEAT Heat Fleece Top

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

    In Stock

  1. Guide Gear Performance T-shirt

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

    In Stock

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

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

    In Stock

  3. 4 Hanes Flannel Boxers

    4 stars
    (17)
    Clearance $14.99 Compare at $40.00

    In Stock

  4. Carhartt Force Super Cold Weather Thermal Underwear Shirt, Black

    5 stars
    (1)
    Buyer's Club $40.49 Non-Member $44.99

    In Stock

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

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

    In Stock

  2. Terramar Thermolator 1/2-zip Top

    5 stars
    (1)
    Buyer's Club $17.99 Non-Member $19.99

    In Stock

  3. Carhartt Base Force Midweight Bottoms

     
    Buyer's Club $31.49 Non-Member $34.99

    In Stock

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

    5 stars
    (1)
    Buyer's Club $40.49 Non-Member $44.99

    In Stock

  1. Carhartt Base Force Midweight Crew Top

     
    Buyer's Club $31.49 Non-Member $34.99

    In Stock

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

    4 stars
    (29)
    Buyer's Club $8.99 Non-Member $9.99 Compare at $25.00

    Item is currently on backorder

  3. Terramar Thermolator Leggings

     
    Buyer's Club $17.99 Non-Member $19.99

    In Stock

  4. Outdoor Research Sequence Leggings

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

    In Stock

  1. Outdoor Research Sequence Long-sleeved Crew

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

    In Stock

  2. 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

  3. 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

  4. 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

  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. 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

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

    5 stars
    (4)
    Buyer's Club $35.99 Non-Member $39.99 Compare at $45.99

    In Stock

  4. Men's WSI® Compression Shorts

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

    In Stock

  1. WSI® WikMax HEATR® 1/4-zip Top

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

    In Stock

  2. WSI® Arctic HEATR® Vent Shirt, Black

     
    Buyer's Club $71.99 Non-Member $79.99 Compare at $89.99

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

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

    In Stock

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Related Products

Carhartt® Heavyweight Crewneck Shirt

Item # WX2-427600

5 stars
(3)
  • 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 Crewneck Shirt. Made heavy-duty for your heavy duties!

"Works" on its own, or as a warm base layer. Made of 9.5-oz., moisture-wicking 100% ringspun cotton knit for comfort as soft as your weekend T-shirt, and construction that holds up! Rib-knit cuffs and crewneck for long wear... plus your sleeves roll up and stay up when you need them to. No-scratch tagless neck label. Carhartt® logo printed on front. Machine wash / dry. Imported.

State Color and Size, as available in the Shopping Cart. Your all-around workday staple.

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

Item # WX2-307432

4 stars
(28)
  • 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 Compare at $32.00

Add to Wishlist

Indera Mills® Performance Thermal Bottoms are 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.

Youth's WSI® Arctic Microtech Long-sleeve Cold Weather Performance Shirt

Item # WX2-219793

  • Info

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

Buyer's Club $35.99 Non-Member $39.99 Compare at $45.99

Add to Wishlist

Youth's WSI® Arctic Microtech Long-sleeve Shirt, the best in cold-weather performance wear!

High-performance athletic apparel, made from special 100% polyester Microtech fabric that traps heat, blocks wind and wicks away sweat! The fabric is body-mapped, thinner under the arms for ventilation and freedom of motion, thicker in the body and arms to block wind. Athletes swear by it, and for good reason... it fits great and provides critical warmth! Stretch-fit. Made in the USA. Machine wash / dry. Imported.

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

3-Pk. Walls Camo Boxers, Mossy Oak Break-Up

Item # WX2-635706

2 stars
(1)
  • 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 Compare at $42.00

Add to Wishlist

3-Pk. Walls® Camo Boxers. SAVE BIG!

Start your day the right way. Super-soft cotton in a roomy, non-binding fit, so you don't get your shorts in a twist. Because it's pretty difficult to have a great day in uncomfortable underwear! You get 3 pairs for 1 LOW price!

Top-quality comfort:

  • 60/40 Cotton/ Polyester blend
  • Comfort-flex waistband
  • Tagless design
  • Machine wash / dry
  • Imported

State Size, as available in the Shopping Cart.

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