Panegy Summer UPF 50+ Sun Protection Outdoor Hat Baseball Cap Mesh Sports Hats Material Fabric: microfiber Size: One Size Head measurement: 56cm - 60cm, Brim: 9cm, Height: 11cm. Adjustable bucket.can be adjusted according to your head circumference Breathable and lightweight dacron,quick dry and UV protect:UPF 50+ Scalable brim design with lenses at boths tirm side. Single chip size is 8.5 cm, sun protection effect better. (Show as picture) Function: Sunscreen, protect eyes, beautiful skin. Great for summer outdoor sports: running, beach, fishing, hiking, tennis, golf, camping, cycling and other outdoor activities.