Offenhauser OFFICIAL LOGO TRUCKER HAT. Made of 50% Cotton and 50% Nylon or 50% Foam and 50% Nylon. Cotton or Foam Front with Mesh Back with an adjustable snapback. Integrated Cotton Sweatband. Cotton Front Features 6 Ventilation Holes. One Size Fits Most Adults. Available in Black Cotton and White Mesh, Grey Cotton and Grey Mesh, White Foam Front and Brown Mesh and White Foam Front and Black Mesh.