– Lightweight, fast drying performance ready COOLwick™ fabric. – UPF +40 protection on the brim. -Large Mesh Panels to dump Excess Heat. – Machine Washable – Pliable brim for easy packability. – Reflective detailing on the back for night run visibility. – Ciele Athletics™ Million Miles Guarantee. – 5 panel fit. 58 cm. Adjustable. One size fits most. See size guide. – Weight 53 Grams – Designed for men and women who run.