The Under Armour ArmourVent Mens Running singlet offers total breathability and moisture management to keep yopu cool in the race. Made with ArmourVent mesh panels that are super light and breathable, a 4-way stretch fabrication allows greater mobility and maintains shape. Lightweight Material wicks sweat dries fast. Added Anti-odor technology prevents the growth of odor-causing microbes to keep your gear fresh and Under Armour logo's feature 360� reflectivity for added visuals in low-light runs. Fit: Fitted.