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.