Men's Base Layers & Long Underwear
![](http://www.craftsports.us/cdn/shop/collections/Baselayer_AW21_DryActiveComfort_23_copy_56177735-92ce-4116-b361-345479a5beff_1200x1200.jpg?v=1661267068)
Shop men's performance baselayers from Craft. Men's sweat wicking base layers and thermal underwear for running, skiing, and cycling are in stock.
![](https://wool.love/cdn/shop/products/mens-100-merino-wool-long-underwear-base-layer-leggings-685900.jpg?v=1695507648)
Men's 100% Merino Wool Long Underwear Base Layer Leggings 190 GSM - Mi – Woolove Apparel
![](https://danishendurance.com/cdn/shop/products/merino-wool-base-layer-set-for-men-716805_1800x1800.jpg?v=1697442718)
MERINO WOOL BASE LAYER SET FOR MEN – DANISH ENDURANCE
![](https://skibarn.com/cdn/shop/products/10263105001_2_800x.jpg?v=1663017482)
Men's Base Layers and Long Underwear - Tagged pants
![](https://pyxis.nymag.com/v1/imgs/eaa/b98/a8fb3b77a04e146b7d0e1e3dc2b04086bf.jpg)
Best Thermal Underwear 2023 Forbes Vetted, 58% OFF
![](https://m.media-amazon.com/images/I/71Vb3ztP+LL._AC_UY1000_.jpg)
3 Pack:Mens Thermal Underwear Base Layer Fleece Lined Fly Long Johns Bottom Pants Warm Long Johns Compression Underpants Cold Tights Leg Warm termicos Hombre Leggings Training Tights Snow- Set 5, S
![](http://daresayny.com/cdn/shop/files/Packa.jpg?v=1695229423)
Mens Thermal Long John Pants - Thermal Bottom Base Layer for Tshirts & – daresay
![](http://mywatsons.com/cdn/shop/products/HEAT_LongJohn_Front_WAH111_BLK.jpg?v=1627666188)
Men's HEAT Thermal pouch-front Long John – Watson's
![](https://cdn11.bigcommerce.com/s-luvww1semp/images/stencil/500x500/products/2213/14096/asts1-gry%20(2)__03626.1707663975.jpg?c=2)
Alpine Swiss Mens Thermal Underwear Long John Set Waffle Knit Top & Bottom Base Layer - Alpine Swiss
![](https://cdn.thewirecutter.com/wp-content/media/2022/12/thermalunderwearmens-1.jpg?auto=webp&quality=75&width=1024)
The 6 Best Thermal Underwear of 2024
![](https://skibarn.com/cdn/shop/files/CLASSIC_NINJA_SUIT_NAVY_CAMP_2324_800x.jpg?v=1692447667)
Men's Base Layers and Long Underwear
![](https://cdn11.bigcommerce.com/s-lhhyh2in/images/stencil/1024x1024/products/1164/6115/ENGEL-704810-Mens-Thermal-Wool-Shirt-MAIN__36322.1641103871.jpg?c=2)
ENGEL - Men's Thermal Underwear Base Layer Long Sleeve Top, 70% Organic Merino Wool 30%
![](http://downwindsports.com/mainSite/wp-content/uploads/2013/10/g_patagonia-polygiene-Capilene-4-one-piece-men-Suit-men-2013-14.jpg)
Best Thermal Underwear 2023 Forbes Vetted, 58% OFF
![](https://merino.tech/cdn/shop/files/Frame600.webp?v=1709193000&width=1200)
Men's Merino Wool Base Layer Sets for All-Season Performance – Merino Tech