Tech Specifications: UPF 50+ certified breathable sun fabric (mesh vents not rated). Detachable 9 1/2" neck/face veil with hybrid venting and size adjustment. Full 8” wide & 3” deep rigid brim. Lightweight: (3.9 oz. - veil included). New! Flip up crown panels with mesh vents. Size adjusting back hook/loop closure. Wicking sweatband integrated into brim. 100% Nylon. Hand wash, line dry. Sizes: Men and Women’s M, L (see hat sizing chart). Patent Pending.