Resealable Team Bags have several possibilities of use. You can use them to protect several cheaper cards. You can put the cards in "bags" in "card sleeves" or without them. Thanks to them, you can effectively sort a large number of cards according to your own criteria and at the same time protect the cards from dirt, scratches and dust. "Team bags" are also often used to protect the card in toploaders. By keeping the toploader in a bag, you protect not only the card from dust and other dirt, but also the toploader itself.