Merino 250 Base Layer Bottom – Men's

Built 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 treatments
• 250-weight fabric hits the sweet spot for cold-weather layering — warm enough for winter, not so heavy you overheat on the climb
• Flatlock seam construction lies flat against skin to eliminate chafing during long days under shell pants or insulated layers
• Slim, athletic fit layers cleanly under ski pants, hunting shells, or hiking softshells without bunching or binding
• Elastic waistband sits comfortably against skin and stays put during high-output activity — no adjusting mid-hike