1.100% Polyester 2.Elastic closure 3.Sun protection: UPF50+, blocking 98% of UV Rays 4.Adjustable: hat crown back elastic string with toggle, adjustable hat circumference 5.Cozy to wear: lightweight quick dry polyester fabric; flüchteg mat Feuchtigkeit wicking Schweessband; ootmen an killt fir de Mesh am Hutt souwuel Säit