Under Armour Men's ArmourVent Tips Polo Imported Machine Wash Soft knit fabric with engineered Mesh ventilation, mapped to the places you need it most Armour Vent "Mesh back delivers true breathability in a light, stretchy, durable, fast-drying fabric Moisture transport system wicks sweat away from the body Anti-odor technology prevents the growth of odor causing microbes Bonded button holes add durability