Tried and True We were the very first running brand to use Merino as a performance fabric, a monumental move that created the ultimate natural fiber running top. One of Tracksmith's original products, refined over the years, perfecting the design utilizing the soft and durable material to create a layer that moves with you, matching the rigor of your runs year after year after year. A constant in Tracksmith’s wardrobe, the Harrier has endured the test of time for a reason: what works, just works. Fabric 89% Merino Wool / 11% Nylon, 170 gsm Care Machine Wash Cold With Like Colors Delicate Cycle Do Not Bleach Line Dry Very good condition, one very small repair at the shoulder. Not obvious at all, as seen in photos Miraculous Merino When it comes to performance fabrics, Merino wool is a freak of nature. If you’ve never worn it before, you’re in for a revelation. A natural, surprisingly soft fiber that stays warm even when drenched with sweat, it also resists odor without washing for longer than you can bear to imagine. It’s the ideal material to beat the chill of early mornings and transition through the warmth after sunrise. The Test of Time As a steady staple in the Tracksmith wardrobe since early days, the Harrier Long Sleeve has proven to persist through the test of miles throughout the years, making it the ultimate natural fiber running shirt.