Air Force Hercules Military Patched Mesh Cap - Tomcat 4 W43S62F Other Made of 65% polyester and 35% cotton. 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, cool and light material.