New with tag Size: one size fit all Unstructured fit conforms to your head for a lower profile Reflective front UA logo & rear wordmark for increased visibility & safety during low-light runs Mesh insets increase ventilation 4-way stretch construction moves better in every direction Material wicks sweat & dries really fast Built-in HeatGear® sweatband wicks away sweat to keep you cool & dry Adjustable closure 88% Polyester/12% Elastane