Using these card covers is a breeze. First, open the toploader by gently prying it open at the top. Then, slide your card into the cover, whether it's unsleeved, single - sleeved, or double - sleeved. When shipping cards, place the covered cards in a sturdy envelope or box to prevent damage. For storage, you can stack them neatly or use them in combination with the Ultimate Guard Treasurehive 90+ or Arkhive. As for maintenance, just wipe them with a soft, dry cloth if they get dirty. Avoid using harsh chemicals as they might damage the plastic. Also, don't bend or twist the toploaders too much to keep them in good shape.