Walking on hard surfaces with no arch support can cause foot and leg fatigue. Superfeet insoles combat this fatigue and keep you feeling spry all day long. These boot insoles come in a range of color options, each corresponding to a particular heel cup depth and cushion level. For example, Superfeet Green is designed with the deepest heel cup, which provides maximum support for shock absorption. In other words, these are great military boot insoles. Superfeet even offers insoles for dress shoes, allowing you to get great support!