This edition of the Nike SF Air Force 1 Mid Premium takes the concept of urban utility to new heights. It's built with a dual-zip heel and an easy-to-clean upper. Versatile style An ankle strap, standard laces and a dual-zip heel work together as a dynamic closure system. This gives you a variety of ways to wear and secure your shoe. Durable Design The heel and tongue are made from durable fabric to keep the shoe flexible and give it a look inspired by military field boots. Real or synthetic leather overlays are easy to clean with a simple swipe.