Go ahead and hit your stride. The Agile Short Sleeve T-Shirt is lightweight and technical. There's mesh under the arms and a gel pocket. 360 degrees reflective details means it's well suited to both daytime and nighttime running. A lightweight blend of two fabrics designed to never weigh you down. Reflective details help keep you seen day and night. Well-placed mesh under the arms keeps the air flowing so you stay dry. Details: AdvancedSkin ActiveDry concept, jersey double knit and warp knit fabrics, active fit, stash pocket, reflective branding front and back visual aspect. Material: Polyester, Mesh.