Rothco Vintage Vietnam Style Boonie Hat Olive Drab 7 eDrab-7. This military bucket hats brim is 3 wide and can fit most with a hat size range of 7 to 7 . The fishing hat features 4 screened side vents; allowing you to stay cool. In addition the adjustable chin strap allows you to tighten or loosen the jungle hat for the perfect fit.' Specifications for Rothco Vintage Vietnam Style Boonie Hat: Manufacturer: Rothco Gender: Unisex Age Group: Adults Fabric/Material: Cotton Rip-Stop 100percent Cotton Rip Stop Fastener/Closure Type: Chin Strap Features of Rothco Vintage Vietnam Style Boonie Hat Material: Cotton Rip-Stop Material Specs: 100percent Cotton Rip Stop Weather: All Weather Package Contents: Rothco Vintage Vietnam Style Boonie Hat Rothco Vintage Vietnam Style Boonie Hat Olive Drab 7 5910-OliveDrab-7