Front: 65% Polyester 35% Cotton Back: 100% Polyester Mesh, Structured, Firm Front Panel. 6 Panel Cap; Seamed Front Panel with Full Buckram; 6 Sewn Eyelets; Pro Stitch on Crown; 8 Rows Stitching on Flat Visor; Matching Fabric Undervisor; Plastic Snap Closure; Size: OSFM - Adult (58cm/22.8")