This Under Armour short - sleeve is perfect for men in various casual or semi - formal work settings. Whether it's an outdoor corporate event or a daily office day, it's a great choice. The shirt has a loose fit, so it gives you plenty of room to move around comfortably. It's made of 87% Polyester and 13% Elastane, which makes it durable and stretchy. The UA Storm technology ensures that it can handle water without sacrificing breathability, keeping you dry and comfortable all day long.