Built for high-output days in variable weather, the Active 1/4 Zip is our go-to mid-layer for trail runners and hikers who need versatility without bulk. The Merino wool blend naturally regulates temperature and fights odor, so you stay comfortable across back-to-back days. Flatlock seams and an athletic cut keep it chafe-free when you're actually moving. Merino wool blend regulates temperature naturally — warm when it's cold, breathable when you're pushing hard Quarter-zip collar lets you dump heat fast without stopping to fully layer up or down Flatlock seam construction reduces chafing against skin during high-output runs and long hikes Athletic fit moves with you during trail runs, cold-weather workouts, or shoulder-season hikes in the South Naturally odor-resistant Merino means you can wear it multiple days without it getting funky — real advantage on multi-day trips
