Footbed: microfiber wrapped EVA absorbs shock, reducing stress on feet, ankles and knees. Durable rubber outsole with a patterned tread provides traction on a variety of surfaces. Vionic orthotic Technology is biomechanically designed to hug your arches and support your feet in comfort. Vionic sandals' built-in orthotic is shown to be effective in helping to treat heel pain (plantar fasciitis).* To preserve the appearance of your Vionic sandals, we recommend that you clean the leather, if needed, using a dry, cotton cloth to wipe away dirt or dust. Keep leather footwear away from direct heat to prevent the leather from drying out. If your sandals become wet, please allow them to dry naturally. We recommend that you test any cleaning product by applying a small amount to a discreet area and allowing it to dry. Do not use cleaners which contain acid or detergents, as they may damage and prematurely age the leather.