Using this card case is easy. Simply unzip the closure and place your cards in the three compartments. You can arrange your credit cards, ID cards, or any other small cards as you like. When you're done, zip it up to keep your cards secure. As for maintenance, it's best to keep it away from water and sharp objects. If it gets dirty, you can use a soft, dry cloth to gently wipe the surface. Avoid using harsh chemicals or abrasive materials as they may damage the leather. Also, store it in a cool, dry place when not in use to maintain its quality.