Equipped with Merrell Opti-Wick technology, this is your go-to tee for long-distance runs and quick errands alike. Throw it on day or night for stretchy, breathable comfort and sweat-purging performance. 100% polyester. 20+ UPF fabric. Merrell N.A.D.A. dye-free colorway option. Mechanical stretch, textured fabric promotes range of motion. Merrell reflective logo.