Modeled after the Vietnam Era Boonie Hat, Milspec Vintage Boonie Hat is constructed of 100% rip-stop cotton for supreme durability. This military bucket hat brim is 3” wide, and can fit most with a hat size range of 7” to 7 ¾”. 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.