A boonie hat, also known as a bush hat, is a form of wide-brim hat commonly used by military forces. The boonie hat was introduced to the United States armed forces during the Vietnam War, when United States Army Green Berets began wearing them in the field, along with Australian and Army of the Republic of Vietnam units. Lightweight and comfortable, the Tactical Boonie Hat combines durability, comfort, and protection. A great cap for outdoor tasks during any season, the Tactical Boonie utilizes comfortable and durable 60/40 cotton/poly twill construction to provide you with a lightweight, yet strong hat. The Boonie Cap's classic full brim design provides welcome protection from the elements when stuck in nasty weather. Vent holes allow air movement, while the adjustable chin strap ensures a snug fit.