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