Built for speed in the wild. This technical longsleeve tee is designed to handle high-output miles on the toughest terrain. It&';s lightweight, super breathable, and powered by TrailGuard(TM) fabric with highly durable nylon to resist abrasion and reduce pilling from packs. The tailored fit, thumbholes, and watch windows make it easy to throw on more layers-because versatility is not an option on the trails. We love it for: trail racing and running TrailGuard(TM): 89% CorduraA(R) nylon & 11% spandex Super lightweight, durable, abrasion-resistant & smooth Tailored fit Perforated back panel Reflective bars Watch windows Thumbholes Waist length Machine wash cold, tumble dry, don&';t bleach Designed in California, made abroad