Tactical Research Belleville 960z Khyber Lightweight Black Side-Zip Boot leather-and-synthetic Vibram sole Shaft measures approximately Mid-Calf" from arch Side Zip Entry for easy-on and easy-off Reliability, stability, and traction  in a lightweight, comfortable boot ACU-approved boot VIBRAM "IBEX" Outsole for rugged terrain and Breathable Combat Lunar lining with TR-1 Load Bearing Orthotic Insole. Deeply serrated Hell Kicker and Heel & Toe Overlays Designed to aid in braking & arresting slides while extending the wear & life of the boot.