Men's Baselayers — 228 products / 1,392 models

Discover our collection of high-performance men's base layers designed to keep you warm, dry, and comfortable during any activity. Whether you need thermal tops, leggings, or long underwear for skiing, hiking, or working outdoors, we have the perfect foundation for your layering system. Shop now to find top-quality materials that regulate temperature and manage moisture, ensuring you perform at your best.image

Men's Baselayers On Sale Up to 85% Off from Top Brands including First Lite, Vertx, Smartwool, Columbia, Icebreaker and More!

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228 Products in Men's Baselayers

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Image of TRYBE Tactical Seamless Thermal Legging - Men's - 2-Pack 7 models TRYBE Tactical Seamless Thermal Legging - Men's - 2-Pack As Low As $5.84 Save Up to 85% Blazin' Deal
Image of Huto Lifestyle Merino Wool 150GSM Base Layer Hoodie 6 models Huto Lifestyle Merino Wool 150GSM Base Layer Hoodie List: $114.99 $86.24 Save 25% 10% Bonus Bucks
Image of Smartwool Intraknit Thermal Merino Base Layer Crew - Men's 7 models Smartwool Intraknit Thermal Merino Base Layer Crew - Men's As Low As $60.36 Save Up to 54% Blazin' Deal
Image of Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Men's 16 models Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Men's $130.00 21% Bonus Bucks
Image of Smartwool Intraknit Merino 200 Crew - Men's 7 models Smartwool Intraknit Merino 200 Crew - Men's As Low As $97.99 Save Up to 35% Final Sale
Image of First Lite Furnace Long John - Men's 15 models First Lite Furnace Long John - Men's $130.00 18% Bonus Bucks
Image of Badlands Pecora Lightweight Merino Legging Baselayers - Men's 5 models Badlands Pecora Lightweight Merino Legging Baselayers - Men's As Low As $81.99 Save Up to $8.00 12% Bonus Bucks
Image of Columbia Midweight Stretch Long Sleeve Top - Men's 5 models Columbia Midweight Stretch Long Sleeve Top - Men's As Low As $27.87 Save Up to 49% Blazin' Deal
Image of Smartwool Merino 250 Baselayer Bottom - Men's 16 models Smartwool Merino 250 Baselayer Bottom - Men's As Low As $93.59 Save Up to 25% On Sale
Image of Smartwool Classic All-Season Merino Base Layer Crew - Men's 16 models Smartwool Classic All-Season Merino Base Layer Crew - Men's As Low As $75.00 Save Up to 25% On Sale
Image of Vertx Merino Base Layer Hoody - Men's Vertx Merino Base Layer Hoody - Men's List: $128.69 $79.99 Save 38% Blazin' Deal
Image of 221B Tactical Equinoxx K2 Thermal Baselayer - Men's 5 models 221B Tactical Equinoxx K2 Thermal Baselayer - Men's As Low As $37.49 Save Up to 75% Blazin' Deal
Image of Smartwool Classic All-Season Merino Base Layer Long Sleeve - Men's 10 models Smartwool Classic All-Season Merino Base Layer Long Sleeve - Men's As Low As $74.79 Save 25% On Sale
Image of Icebreaker Merino 200 Oasis SS Crewe - Men's 10 models Icebreaker Merino 200 Oasis SS Crewe - Men's As Low As $65.99 Save Up to 40% Blazin' Deal
Image of Icebreaker Merino 260 ZoneKnit Long Sleeve Crew Thermal Top - Men's 3 models Icebreaker Merino 260 ZoneKnit Long Sleeve Crew Thermal Top - Men's As Low As $93.99 Save Up to 46% On Sale
Image of Icebreaker Merino 260 ZoneKnit Leggings - Men's 2 models Icebreaker Merino 260 ZoneKnit Leggings - Men's As Low As $93.99 Save Up to 46% Final Sale
Image of Smartwool Merino 250 Baselayer 3/4 Bottom - Men's 5 models Smartwool Merino 250 Baselayer 3/4 Bottom - Men's List: $115.00 $104.49 Save $10.51
Image of First Lite Yuma Synthetic Long Sleeve Crew - Men's 16 models First Lite Yuma Synthetic Long Sleeve Crew - Men's $95.00 12% Bonus Bucks
Image of Vertx Merino Base Layer Pant - Men's Vertx Merino Base Layer Pant - Men's List: $87.44 $67.49 Save 23% Blazin' Deal
Image of Obermeyer Flex 1/4 Zip Tops - Men's Obermeyer Flex 1/4 Zip Tops - Men's List: $119.00 $28.92 Save 76% Blazin' Deal
Image of Kryptek Theos Merino Bottoms - Men's 8 models Kryptek Theos Merino Bottoms - Men's List: $99.99 Add to Cart for Your
Special Price Blazin' Deal
Image of Vertx Trailslacker Pant - Men's 120 models Vertx Trailslacker Pant - Men's As Low As $70.54 Save Up to 21% Blazin' Deal
Image of Blocker Outdoors Blocker Koretec Heavy Weight Top 1409139 Blocker Outdoors Blocker Koretec Heavy Weight Top 1409139 List: $63.99 $39.99 Save 38% 13% Bonus Bucks
Image of Smartwool Classic All-Season 1/4 Zip Merino Base Layer - Men's 4 models Smartwool Classic All-Season 1/4 Zip Merino Base Layer - Men's $105.00 18% Bonus Bucks
Image of Rab Force Hoody - Men's 9 models Rab Force Hoody - Men's List: $80.00 $69.99 Save 13% On Sale
Image of First Lite Wick Long Sleeve Crew - Men's 30 models First Lite Wick Long Sleeve Crew - Men's $100.00 18% Bonus Bucks
Image of DRIFIRE FR Ultra Lightweight Short Sleeve Tee - Men's 23 models DRIFIRE FR Ultra Lightweight Short Sleeve Tee - Men's As Low As $42.50 Save Up to 46% Blazin' Deal
Image of Rothco ECWCS Gen III Level II Mid-Weight Underwear Top - Men's 31 models Rothco ECWCS Gen III Level II Mid-Weight Underwear Top - Men's As Low As $43.99 Save Up to 20% On Sale
Image of Smartwool Classic Thermal Merino Base Layer Crew - Men's 13 models Smartwool Classic Thermal Merino Base Layer Crew - Men's As Low As $86.79 Save Up to 31% On Sale
Image of Columbia Midweight Stretch Tight - Men's 5 models Columbia Midweight Stretch Tight - Men's As Low As $27.87 Save Up to 49% Blazin' Deal
Image of Black Diamond Coefficient LT Pants - Men's 4 models Black Diamond Coefficient LT Pants - Men's $129.00
Image of Rothco Midweight Thermal Knit Bottom 3 models Rothco Midweight Thermal Knit Bottom As Low As $25.99 Save Up to 16%
Image of Icebreaker Merino 200 Oasis Long Sleeve Half Zip Thermal Top - Men's 8 models Icebreaker Merino 200 Oasis Long Sleeve Half Zip Thermal Top - Men's As Low As $99.99 Save Up to 23% Final Sale
Image of Black Diamond Coefficient LT QZ Po - Men's 5 models Black Diamond Coefficient LT QZ Po - Men's As Low As $169.99 Save Up to 10% 21% Bonus Bucks
Image of Muddy TRX Base Layer Bottoms - Men's 10 models Muddy TRX Base Layer Bottoms - Men's As Low As $29.89 Save Up to $2.10
Image of Rothco Gen III Silk Weight Underwear Top 13 models Rothco Gen III Silk Weight Underwear Top As Low As $21.99 Save Up to 23% 18% Bonus Bucks
Image of ScentLok ScentLok Climafleece BaseSlayer Bottom 1409166 ScentLok ScentLok Climafleece BaseSlayer Bottom 1409166 $109.99
Image of Rothco Gen III Silk Weight Bottoms - Men's 18 models Rothco Gen III Silk Weight Bottoms - Men's As Low As $9.10 Save Up to 57% Blazin' Deal
Image of ScentLok ScentLok Climafleece BaseSlayer Bottom 1409167 ScentLok ScentLok Climafleece BaseSlayer Bottom 1409167 $109.99
Image of Badlands Pecora Lightweight Merino Crew - Men's 5 models Badlands Pecora Lightweight Merino Crew - Men's As Low As $103.99 Save Up to 13%
Image of ScentLok ScentLok Climafleece BaseSlayer Bottom ScentLok ScentLok Climafleece BaseSlayer Bottom List: $99.99 $93.99 Save $6.00
Image of Icebreaker Merino 150 Anatomica SS Crewe - Men's 8 models Icebreaker Merino 150 Anatomica SS Crewe - Men's List: $80.00 $74.49 Save $5.51
Image of Smartwool Merino 250 Baselayer Crew - Men's 26 models Smartwool Merino 250 Baselayer Crew - Men's As Low As $79.99 Save Up to 36% On Sale
Image of 221B Tactical Equinoxx Stage 3 Ultra-Thermal Mock - Men's 6 models 221B Tactical Equinoxx Stage 3 Ultra-Thermal Mock - Men's As Low As $79.49 Save Up to 33% Blazin' Deal
Image of DRIFIRE Prime FR Mid-Weight Soft Compression Short Sleeve Tee - Men's 7 models DRIFIRE Prime FR Mid-Weight Soft Compression Short Sleeve Tee - Men's As Low As $65.71 Save Up to 46%
Image of Browning Merino Crew Long Sleeve Baselayer Shirt - Mens 6 models Browning Merino Crew Long Sleeve Baselayer Shirt - Mens As Low As $63.79 Save Up to 20%
Image of Browning Merino Hooded Shirt - Mens 6 models Browning Merino Hooded Shirt - Mens As Low As $74.79 Save Up to 25%
Image of TRYBE Tactical Seamless Thermal Long-Sleeve Shirt - Men's - 2-Pack TRYBE Tactical Seamless Thermal Long-Sleeve Shirt - Men's - 2-Pack List: $44.99 $37.99 Save 16% Final Sale
Image of Browning Merino 1/4 Zip Shirt - Mens 6 models Browning Merino 1/4 Zip Shirt - Mens As Low As $78.49 Save Up to 22%
Image of 5.11 Tactical CAMS S/S Baselayer - Mens 11 models 5.11 Tactical CAMS S/S Baselayer - Mens List: $71.00 $66.00 Save $5.00
Image of Browning Merino Pant - Mens 6 models Browning Merino Pant - Mens As Low As $63.79 Save Up to 20%
Image of DRIFIRE FR Ultra Lightweight Long Sleeve Tee - Men's 25 models DRIFIRE FR Ultra Lightweight Long Sleeve Tee - Men's As Low As $76.00 Save 20%
Image of Muddy TRX Base Layer Crew Top - Men's 10 models Muddy TRX Base Layer Crew Top - Men's As Low As $32.89 Save Up to 17%
Image of Smartwool Classic All-Season Merino Bottom Base Layer - Men's 5 models Smartwool Classic All-Season Merino Bottom Base Layer - Men's List: $100.00 $75.00 Save 25% On Sale
Image of Browning Gunner Long Sleeve Baselayer Shirt - Mens 9 models Browning Gunner Long Sleeve Baselayer Shirt - Mens List: $49.99 $47.99 Save $2.00
Image of Vertx Full Guard Performance Shirt - Men's 21 models Vertx Full Guard Performance Shirt - Men's As Low As $35.69 Save Up to 27% Blazin' Deal
Image of Condor Outdoor Base II Base Layer - Crew 14 models Condor Outdoor Base II Base Layer - Crew List: $29.25 $27.99 Save $1.26
Image of King's Camo XKG Foundation 150 Merino Bottom Baselayer - Men's 5 models King's Camo XKG Foundation 150 Merino Bottom Baselayer - Men's As Low As $67.49 Save Up to 16% Blazin' Deal
Image of First Lite Horizon Hemp Long Sleeve Top - Men's 18 models First Lite Horizon Hemp Long Sleeve Top - Men's $90.00
Image of King's Camo XKG Foundation 260 Zip Off Merino Bottom Baselayer - Men's 4 models King's Camo XKG Foundation 260 Zip Off Merino Bottom Baselayer - Men's As Low As $94.99 Save Up to 14% Blazin' Deal
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    Last updated 2026-08-02 UTC.