Rothco Lightweight Adjustable Mesh Boonie Hat Khaki Khaki. The boonie is made of lightweight polyester with mesh ventilation that covers about 3/4 of the crown aiding in ventilation around your head keeping you cool and dry while the 3 inch brim protects your head and face from the sun during outdoor activities. Inspired by the classic military boonie the Rothco mesh boonie hat features branch loops a chin strap with button lock and a sweatband.' Specifications for Rothco Lightweight Adjustable Mesh Boonie Hat: Manufacturer: Rothco Gender: Unisex Age Group: Adults Hat Size US: One Size Fabric/Material: 100percent Polyester Polyester Fastener/Closure Type: Chin Strap Features of Rothco Lightweight Adjustable Mesh Boonie Hat Material: Polyester Material Specs: 100percent Polyester Package Contents: Rothco Lightweight Adjustable Mesh Boonie Hat Rothco Lightweight Adjustable Mesh Boonie Hat 59555