A performance top for cooler conditions, reimagined in a heavier Merino knit with 37.5® Technology to optimize temperature regulation.

Even More Hardy Harriers
For more than a decade we’ve pioneered the use of Merino wool in high-performance running apparel, leveraging its natural ability to regulate temperature and resist odor for countless miles. It’s a key component in our longstanding Harrier Long Sleeve, an enduring element even as we’ve refined the style over the years. Our latest edition features an updated silhouette with thumbholes for comfort and coverage. Cut from a heavier knit blend and powered by 37.5® Technology, it pairs innovative thermoregulation with Merino’s innate odor resistance for a technical top that breathes easy and bears the chill.

Designed for running in cool to cold conditions
Made in a Merino wool blend
Thermoregulation powered by 37.5® Technology
Finished with a thumbhole on the inside seam of each cuff
Reimagined relaxed silhouette with raglan sleeves

Body Fabric: 50% Merino Wool (17.5 micron) / 41% 37.5® Nylon / 9% Nylon, 205 gsm
Odor-resistant, even if you skip laundry day
37.5® Technology for optimal temperature regulation and moisture management
Machine wash cold with like colors. Delicate cycle. Do not bleach. Do not use softeners. Lay flat to dry.