Using this card holder is easy. Just open the folding pouch and slide your cards into the two pockets. It's great for keeping your important cards organized while you're on the go. When using it, be careful not to over - stuff it as it's designed to hold up to 4 cards. To maintain it, you can simply wipe it with a soft, dry cloth if it gets dirty. Avoid exposing it to extreme heat or sharp objects as this could damage the PVC material.