ZoneKnit Long Sleeve Half Zip – Men's

Built for high-output days in cool conditions, the ZoneKnit Half Zip is our top pick for runners and hikers who run hot but still need warmth. Body-mapped ZoneKnit construction places open-knit merino panels where you generate the most heat, dumping excess warmth without stripping your core. Thumb loops and a half-zip collar let you dial fit and airflow on the fly.

• ZoneKnit body-mapped panels position open-knit merino zones at high-heat areas for targeted ventilation where you actually sweat
• Merino wool construction naturally resists odor and regulates temperature — no synthetic funk after back-to-back wears
• Regular fit moves with you and layers cleanly under a shell or vest without bunching
• Half-zip neckline gives you quick airflow control when pace or terrain changes mid-run or mid-climb
• Thumb loops lock sleeves in place during glove transitions or high-arm movement — a small detail that matters on long efforts