Classic All-Season Merino Base Layer 1/4 Zip – Men's

For trail runners, hunters, and backcountry athletes who need one layer that works year-round, the Classic All-Season Merino Quarter-Zip is our top pick for versatile base layering. Natural merino wool regulates temperature and resists odor far longer than synthetics, so you stay comfortable across multiple days and big effort swings. A slim athletic fit layers cleanly under a shell or hunting layer without bunching.

• Merino wool blend actively regulates body temperature — keeps you warm at rest, vents when you're working hard without feeling clammy
• Natural odor resistance lets you wear it for multiple days in the backcountry or on a hunt before it becomes a problem — no synthetic funk
• Flatlock seams lie flat against skin to eliminate hotspots and chafing under a pack, harness, or layering system
• Slim athletic fit layers cleanly under a softshell, rain jacket, or hunting layer without bunching or binding at the shoulders
• Quarter-zip collar gives you fast ventilation control on climbs or seals up when temps drop — more adjustability than a crew neck