Underwear & Base Layer

Save big on Underwear at Sportsman's Guide. Every guy could use a couple new pairs of Boxers or Briefs in their life; but we have more to offer like Thermals, Long Underwear, Compression Shorts, Scent Proof Base Layers, Long Johns, and more.

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

    3 stars
    (26)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $50.00

    In Stock

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

    4 stars
    (28)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $50.00

    In Stock

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

    4 stars
    (59)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $40.00

    In Stock

  4. Under Armour® ColdGear® Infrared EVO Mock Turtleneck

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

    In Stock

  1. Under Armour® ColdGear® Infrared EVO Leggings

    4 stars
    (11)
    Non-Member $54.99 Buyer's Club Discount Applied at Checkout!

    In Stock

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

    4 stars
    (34)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $40.00

    In Stock

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

    4 stars
    (38)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $40.00

    In Stock

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

    5 stars
    (63)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $40.00

    In Stock

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

    5 stars
    (50)
    Buyer's Club $26.99 Non-Member $29.99 Compare at $75.00

    In Stock

  2. 6-Pk. Guide Gear® Boxer Briefs

    5 stars
    (100)
    Buyer's Club $22.49 Non-Member $24.99 Compare at $38.00

    In Stock

  3. Under Armour® Base 3.0™ Leggings

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

    In Stock

  4. Under Armour® Base 3.0™ Crew

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

    In Stock

  1. Under Armour® Base 2.0™ Leggings

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

    In Stock

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

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

    In Stock

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

    4 stars
    (11)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $32.00

    In Stock

  4. 6-Pk. Guide Gear® Pouch Briefs

    5 stars
    (76)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $38.00

    In Stock

  1. New U.S. Military Surplus Polartec® X-static® Long-sleeved Crew Shirt, Coyote

    5 stars
    (11)
    Buyer's Club $22.49 Non-Member $24.99 Compare at $50.00

    In Stock

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

    5 stars
    (36)
    Buyer's Club $26.99 Non-Member $29.99

    In Stock

  3. Under Armour® Base 2.0™ Crew

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

    In Stock

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

    5 stars
    (21)
    Buyer's Club $22.49 Non-Member $24.99

    In Stock

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

     
    Buyer's Club $22.49 Non-Member $24.99

    In Stock

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

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

    In Stock

  1. 4 Hanes® Flannel Boxers

    4 stars
    (9)
    Buyer's Club $22.49 Non-Member $24.99 Compare at $40.00

    In Stock

  2. Indera® 2-layer Performance Thermal Bottoms, Gray

    4 stars
    (10)
    Clearance $14.99 Compare at $38.00

    In Stock

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

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

    In Stock

  4. Clam™ Ice Armor™ Base Layer Fleece Top

    4 stars
    (3)
    Buyer's Club $29.69 Non-Member $32.99

    Item is currently on backorder

  1. Men's WSI® Compression Shorts

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

    In Stock

  2. 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

  3. 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

  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® Microtech Fitted Sleeveless Shirt

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

    In Stock

  2. ScentShield® S3® Mid-weight Wool Shirt

    4 stars
    (1)
    Buyer's Club $71.99 Non-Member $79.99 Compare at $94.99

    In Stock

  3. Clam™ Ice Armor Merino Wool Blend Base Layer Bottom

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

    Item is currently on backorder

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

    4 stars
    (5)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $25.99

    In Stock

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

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

    In Stock

  2. WSI® WikMax HEATR® 1/4-zip Top

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

    In Stock

  3. ScentShield® S3® Mid-weight Wool Pants

     
    Buyer's Club $62.99 Non-Member $69.99 Compare at $84.99

    In Stock

  4. 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

  1. ScentShied® S3® Expedition-weight Wool Pants

    5 stars
    (1)
    Buyer's Club $53.99 Non-Member $59.99 Compare at $74.99

    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. Carhartt® Heavyweight Cotton Thermal Long Underwear Bottoms

    5 stars
    (3)
    Non-Member $29.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  4. Carhartt® Heavyweight Crewneck Shirt

    5 stars
    (1)
    Non-Member $29.99 Buyer's Club Discount Applied at Checkout!

    In Stock

  1. Rock Face® 7-oz. Raschel Thermal Pants

    4 stars
    (2)
    Buyer's Club $13.49 Non-Member $14.99 Compare at $20.00

    In Stock

  2. Rock Face® 2-layer Thermal Pants from Rock Face®

    3 stars
    (2)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $27.00

    In Stock

  3. Rock Face® 7-oz. Raschel Thermal Shirt

    3 stars
    (1)
    Buyer's Club $13.49 Non-Member $14.99 Compare at $20.00

    In Stock

  4. Rock Face® 2-layer Thermal Shirt from Rock Face®

    4 stars
    (2)
    Buyer's Club $17.99 Non-Member $19.99 Compare at $27.00

    In Stock

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These long johns and underwear are great for Outdoors activities. We carry many of your favorite brands like Under Armour, Guide Gear, WSI, and 5.11 Tactical.

Related Products

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

Item # WX2-219793

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

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.

5.11 Tactical® Loose Fit Crew Shirt

Item # WX2-230301

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

5.11 Tactical® Loose Fit Underwear Crew Shirt Mens underwear base layer allows for a free - and - easy feel under tactical equipment!

Having the right underwear shirt for a ballistic vest is crucial for comfort and performance. The 5.11 Loose Fit Crew Short Sleeve Underwear Shirt fits that need with its unique design and features. This loose fit crew is designed for wear under body armor but is also great for casual and workout wear. Underwear layers available in short- and long-sleeve loose fit crews and short-sleeve v-necks, these loose fit crews are a necessity for body armor wear.

  • Mens underwear is made with 100% polyester
  • Mild athletic compression fit
  • Underwear base layers with anti-microbial, quick-drying, moisture-wicking comfort
  • Strong, durable flat-lock seams
  • Underarm mesh panels give this underwear venting printed label prevents chafing
  • Machine wash / dry. Imported.

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

5.11 Tactical® Utili - T Long - sleeve Shirts, 2 - pack

Item # WX2-230305

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

2 - Pk. 5.11 Tactical® Utili - T Long - sleeve Underwear Shirts Underwear base layers preferred by uniformed professionals!

Law enforcement, military and fire professionals consistently choose the 5.11 Utili-T™ underwear crew shirts as the undershirt for uniform wear. The Utili-T crew underwear shirts are longer than most crew neck T-Shirts so that the shirt stays tucked in no matter what the activity. Mens underwear made of 100% ring spun cotton, the Utili-T Crew shirts are comfortable, durable and a great value. The shirt can be worn under ballistic vests, as a casual shirt or used for everyday under uniform wear.

  • 1" no-roll, high-density collar
  • Underwear featuring moisture-wicking design keeps your body bone dry and comfy, all day
  • Printed label prevents chafing
  • Double-needle stitching gives your underwear base layer t-shirt increased durability
  • Machine wash / dry. Imported.

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

5.11 Tactical® Sports Boxer Brief

Item # WX2-230308

4 stars
Starting at...
Non-Member $24.99 Buyer's Club Discount Applied at Checkout!

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.

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