Lightweight and stretchy, the Under Armour Women's IsoChill Launch Run Cap does more than keep the sun from your eyes. Its low-profile design creates a sleek and secure fit and the stretch woven fabric is both durable and breathable with added laser perforations to keep you cool. Inside, an Iso-Chill sweatband works to disperse body heat and at the back, an adjustable hook and loop closure provides a secure fit without snagging hair. Finished with reflective details to keep you visible when running in low light.