To use these sleeves, simply slide your trading cards into them one by one. They're designed to fit snugly, so don't force the cards in too hard. When shuffling, the smooth surface of the sleeves will give you a great feel. As for maintenance, keep them away from sharp objects to avoid tearing. You can store them in a cool, dry place to preserve their quality. Since they're made from acid - free and PVC - free materials, you don't have to worry about damage to your cards over time. Just enjoy using them in your trading card games and keep your cards protected.