The military jungle boot was developed during World War II for combat in jungle terrain. Military jungle boots are military combat boots designed for use in jungle warfare. Military jungle boots feature vent holes in the instep for ventilation and drainage of moisture. Regular standard military combat boots are unsuitable and uncomfortable to wear in humid and wet environments. Military jungle boots generally come with a panama sole or ripple sole. In 1944, the Panama sole was first developed by U.S. Army Sergeant Raymond Dobie, which used a series of angled rubber lugs in the soles to push soft mud from the soles, clearing them and providing much better grip in greasy clay or mud. Military jungle boots can be worn by everyone for outdoor activities such as camping and hiking or for comfort.