The Clarks Unstructured Un.Randolph is a comfortable shoe with a touch of class. Premium, full-grain leather upper offers immediate wear with no break-in required. 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 Ã¢â¬ÅUltra Flex EVA outsole sole reduces lift load and foot fatigue for all-day wear. Rubber outsole pads absorb shock and add traction without weight.