Front: 100% Polyester | Back: 100% Nylon Mesh, *Crown slightly different than Style 39-165*. Front: 100% Polyester | Back: 100% Nylon Mesh; 5 Panel Cap; Seamless Foam Front Panel with Lining; 8 Rows Stitching on Visor; Matching Fabric Undervisor; Matching Color Sweatband; Matching Color Braid; Plastic Adjustable Snap; Polyester Fine Cloth Sweatband