Using this card holder is a breeze. Just open the folding pouch and slip your cards into the pockets. You can keep up to 4 cards neatly organized. When you're traveling, keep your travel passes in it for easy access. For daily use, it's great for storing bank cards, IDs and student cards. As for maintenance, simply wipe it with a dry cloth if it gets dirty. Avoid exposing it to high - heat environments as it's made of PVC, which may deform under extreme heat. Also, don't force too many cards into it to prevent damage to the pockets.