– lightweight, fast-drying performance-ready COOLwick™ 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. – ciele athletics™ million miles guarantee. – pinched crown fit. 58 cm. adjustable. one size fits most. see size guide. – weight 72 grams. – designed for people who run.