Lowa Men's Catalan GTX FreeFlex Hiking Boot 100% Leather and textile Vibram sole Shaft measures approximately 7" from arch Heel measures approximately 1.5" Platform measures approximately 1 inches Boot opening measures approximately 13.75" around Waterproof, breathable GORE-TEX inner boot Full-length nylon shank and polyurethane midsole provide torsional support underfoot Flexible sole Self-cleaning tread