The Danner Crater Rim 6 Inch Hiking boot, is the same exact boot used by the Army, Marine and Special Operations teams deployed in Afghanistan. Why are they called 2 different names? The military issue do not have a hook but a regular eyelid at the top end. The boot is built extremely tough. These boots are meant for extreme rocky jagged terrain. These are not your everyday hikers. The come with gortex, extremely tough Vibram soles, They are completely water proof and can be used in very cold weather. I highly recommend using insoles for added comfort as they are little stiff but not bad. I highly endorse these boots. I am an avid outdoorsman, hunter, hiker etc. They are built in the USA. One the few items still being made in the U.S.