For more than a decade Tracksmith have pioneered the use of Merino wool in high-performance running apparel, leveraging its natural ability to regulate temperature and resist odour for countless miles. It’s a key component in their longstanding Harrier Long Sleeve, an enduring element even as we’ve refined the style over the years. Their 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 odour resistance for a technical top that breathes easy and bears the chill.

Product Details:

• 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