Runners need more from their hats than just keeping the sun out of their eyes. These are also light, stretchy, and breathable, with a built-in, cool-to-the-touch sweatband. Every runner needs a couple of these. Lightweight, durable woven fabric with perforated panels & mesh for breathability where you need it. 4-way stretch material moves better in every direction. Iso-Chill sweatband helps disperse body heat, making it feel cool to the touch. Low-profile hook & loop closure to avoid hair snagging with elastic layer underneath for added stretch. Reflective logo. 100% Polyester.