CLARKS Unstructured Women's Un.Durga Fashion Sneaker 100% Leather Rubber sole Heel measures approximately 3/4" Lambskin lining with reduced stitching surrounds the foot in luxurious softness to prevent irritation and blisters Removable, vegetable-tanned leather insole reduces foot friction Unique air circulation system features intake vents to allow cooler, fresh air to enter 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