200 Oasis Long Sleeve Half Zip – Men's

For cool-weather trail runs, hunts, or mountain days, the 200 Oasis Half Zip is our favorite lightweight merino base layer for guys who run warm and need odor control on multi-day trips. 100% merino wool at a 200gsm weight regulates temperature naturally without the clammy feel of synthetics. Flatlock seams and an underarm gusset keep it chafe-free under a pack or shell.

• 100% merino wool at 200gsm — warm enough for cool conditions, light enough to layer without bulk
• Natural odor resistance means you can wear it multiple days without it becoming a biohazard — critical on backcountry trips
• Flatlock seams eliminate chafing under packs or harnesses, and the underarm gusset gives you full range of motion
• Half-zip collar lets you dump heat fast on climbs without stripping a layer — ideal for variable Southern mountain weather
• Available in Midnight Navy, Loden, Lazurite, and Gritstone Heather — sizes S through XXL