Smartwool Merino 250 Base Layer Bottom – Men's Size:M Built for high-mileage trail runners

Built for high-mileage trail runners who refuse to trade cushion for speed

Neptune Blue

Built for runners who log miles before sunrise or after dark

The relaxed fit and side-slit hem give you room to move without the boxy feel

Fair Trade Certified sewn

Smartwool Merino 250 Base Layer Bottom – Men's Size:M Built for high-mileage trail runnersBuilt for cold weather output on winter hikes, backcountry hunts, or camp mornings, the Merino 250 Bottom is our top pick for athletes who run hot and cold in the same day. 100% merino wool naturally regulates temperature and fights odor without chemical treatments, while flatlock seams keep things comfortable under a shell for hours on end. 100% merino wool construction delivers natural warmth, breathability, and odor resistance without synthetic