Designed to come along. Performance fabric for the exertion of the road. Adjustable strap for longitude-induced changes in head size. Discrete 1-key pocket concealed in the front. Taped seams and highly compressible material means it fits tight in a bag or a pocket.
Made from a stretch poly mix, it's designed to breathe. Mid crown 5 panels for classic semi-structured look, but also nimble enough to fold and put in your pocket.