Pierre uses mostly leather produced in France due to the quality and natural processing. These leathers have an irregular grain most of the time which is a normal characteristic. We recommend to avoid contact with water, oily substances, direct sunlight and light-colored clothes. By using your product regularly it will get a warm patina and obtain a nicer look. In case of unwanted dirt marks please contact us for cleaning recommendation. However, please note that we cannot guarantee the outcome resulting from our advice.