To use these card sleeves, simply slide your playing cards into them one by one. It's easy and helps protect your cards from wear and tear. Remember, these sleeves are not suitable for children under 36 months, so keep them out of reach of little ones. To maintain the sleeves, avoid exposing them to excessive heat or moisture. You can gently wipe them with a dry cloth if they get dirty. This way, you can enjoy using these durable and high - quality sleeves for a long time.