NIKE Dri-Fit Miler Singlet Running Vest UV protection - to give you some protection from the sun on those hot sunny days. Nike Dri-FIT fabric - wicks away moisture to help keep you dry and comfortable. Dri-Fit construction draws sweat away from the body, keeping you cool and comfortable. Nike+ cord management solution at the back of the neck to keep those wires out of the way Flatseam Construction - reduces chaffing and rubbing which can occur, improving comfort and also freedom of movement