Front: 80% Polyester 20% Cotton Back: 100% Polyester Mesh , Structured, Firm Front Panel. 5 Panel Cap; Seamed Front Panel with Full Buckram; 6 Rows Stitching on Visor; Matching Fabric Undervisor; Matching Color Sweatband; Plastic Snap Closure; Size: OSFM - Adult (58cm/22.8")