The Nike Stride Dri-FIT ADV short-sleeve running top is designed to help reduce chafing and improve breathability. It is made of 100% polyester. The raglan sleeves help reduce underarm chafing and allow for a wider range of motion. The top's extended length helps keep covered. Nike Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering. It features reflective graphics on sleeves and a reflective Swoosh logo on left chest. This item is a t-shirt with short sleeves, perfect for running.