AXO Drone Boots (Black, Size 11) Instep panels are long enough to fit a wider range of calf and leg sizes. Generous toe box for comfort A tapered vinyl and foam gaiter wraps the top of the boot offering a barrier which resists dirt from entering. 4 replaceable PU molded buckles float on their bases allowing unrestricted alignment. The steel shank adds comfort and support. The sole is attached to the upper using a time tested welted construction.