Tactical Research Belleville MAXX8Z MAXX 8" Side Zip Boot, Black, 8.5 leather-and-rubber Vibram sole Shaft measures approximately Mid-Calf" from arch Part of the new MAXX Series of ultra-cushioned tactical boots Designed to get you through long marches and rugged terrain or simply a long day on your feet Unique performance Fatt Maxx midsole that features higher volume, softer density, and greater rebounding foam than standard tactical boots Maxx Series of boots allow the foot to sink deeply into the midsole for greater support, stability, uniformity of stride and overall comfort YKK waterproof nylon zipper with molded security overlay