The Jungle/Hot weather boot has been in service for a long time. Contrary to popular belief, the invention of the Jungle Boot predates WWII. Developed by the US Rubber Company in conjunction with the US Military, the original design were rubber-soled with a canvas upper. The design of the Jungle Boot was based on the idea that “no boot could possibly keep out water and still provide sufficient ventilation to the feet in a jungle or swamp environment.”
The “Panama Sole” was developed in 1944 by US Army Sergeant Raymond Dobie.
In 1965 and 1966, the US Military made further improvement to the design of the boot, water drains, nylon canvas, Panama outsources, and reinforced webbing and steel shanks were added, giving us the iconic design we know today.