CLARKS Men's Un.ravel 100% Leather Imported Rubber sole Shaft measures approximately 2.63" from arch Lambskin lining with reduced stitching for blister prevention Removable vegetable-tanned leather insole Unique air circulation system features intake vents to allow optimal breathability Channeled mesh creates a defined path for warm, moist air to flow and escape through exhaust vents Lightweight ''Ultra Flex'' EVA outsole sole reduces lift load and foot fatigue for all-day wear