Using this Pokémon 4 - Pocket Portfolio is easy. Just open it up and slide your standard size Pokémon cards into the polypropylene pages. You can load one card per pocket (single - loading) or two (double - loading) to save space. For oversized Pokémon cards, use the special pages in the center. When handling the portfolio, be gentle to avoid damaging the pages. To keep it in good condition, store it in a cool, dry place away from direct sunlight. And remember, the cards you see in the pictures are not included, so you'll need to use your own collection.