Race-ready base layer The secret sauce to your next run, the Women’s Tecbase Long Sleeve Base Layer is lightweight and formfitting, meaning you’ll barely notice it under your jersey as you rip down the trail. It feels exactly how it was designed to feel—ultrasoft and second-skin in nature. Constructed from anti-stink fabric, the Women’s Tecbase Long Sleeve Base Layer is ready to go wherever you’re going, and fast. Ultrasoft material with slim silhouette Anti-microbial material prevents odor 100% polyester