The 8 Best Merino Wool Base Layers in 2024 - Best Base Layers for Running

On cold days, Merino wool keeps you warm, dry, and stink-free. These base layers—from Smartwool, Tracksmith, and other trusted brands—are great for runners.

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Point6 has made the Best Base Layer Ever for the ultimate in comfort when youre in the elements. The only company using extra fine 18.5 micron compact-spun wool, Point6 base layers feature extreme durability and unparalleled comfort and softness. Point6 merino wool keeps you perfectly warm and is naturally moisture wicking and odor fighting, keeping you feeling great all day on the slopes or trails.

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The 8 Best Merino Wool Base Layers in 2024 - Best Base Layers for Running

The Smartwool Men's Merino 250 Base Layer 1/4 Zip has an updated fit to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

Smartwool Classic Thermal Merino Base Layer Men's 1/4 Zip Black Color Shift / XL