To use these sleeves, simply slide your cards into them one by one. Make sure to align the cards properly so they fit snugly. When shuffling your sleeved cards, you'll notice a smooth and satisfying feel. As for maintenance, keep them away from sharp objects to avoid tearing. Store them in a cool, dry place to maintain their quality. If they get dirty, you can gently wipe them with a soft, dry cloth. Just remember, these sleeves are designed to protect your cards, so handle them with care.