100% polyester material; Mesh around the crown of the head keeps you cool and ventilated; 1" wide reflective material with 2" contrasting color material 360 degrees around the hat; Dark grey under brim reduces glare; Reflecting piping around brim and top of hat; Drawstring keeps the hat securely on your head; ANSI 107 Accessory; Fabric dye lot variances may occur and meet luminance factor as stated in the standard.;