Air Borne Wing Shape Patched Mesh Cap - Air Assault W42S60F Other Made of 35% cotton and 65% polyester, mesh back. ONE SIZE fits most with adjustable plastic snap closure, fitting up to XL. Crown measures 4 inches deep, structured, 6 panels, prostyle, 4 panels in mesh back. Bill measures 3 inches long, pre curved, same color under bill. Thick, light and cool material.