To use these sleeves, simply slide your cards into them one by one. When you're playing, enjoy how the clear front lets you easily see the card details while the matte back provides a nice grip. As for maintenance, keep them away from sharp objects to avoid tears. If they get dirty, you can gently wipe them with a soft, dry cloth. Don't expose them to extreme heat or moisture, as this can damage the sleeves. That way, you can keep using them for a long time and keep your cards well - protected.