– lightweight, fast-drying performance ready COOLwick™ knit mesh – welded back seam for comfort fit. – UPF +40 protection on the brim and front panel. – reflective detailing on the front, back and underbrim for night run visibility. – pliable SOFTcurve pre-curved brim for easy packability. – machine washable. – Ciele athletics™ million miles guarantee. – fast fit. low crown. 56.5 cm. adjustable. one size fits most. see size guide – weight 53 grams. – designed for people who run.