'- lightweight, fast-drying performance-ready COOLmatic™ fabric and repreve recycled performance fiber. - UPF +40 protection on the brim, front panel and back panel. - machine washable. - pliable SOFTcurved pre curved brim for easy packability. - reflective detailing on the front and back for night run visibility. - ciele athletics™ million miles guarantee. - pinched crown fit. 58 cm. adjustable. one size fits most. see product guide to compare fits. - weight 72 grams. - designed for people who run.