The Trading Card Sleeves Hard Plastic Clear Case Holder is a practical and durable solution for storing and organizing a collection of baseball cards. With a total of 300 card sleeves included, this toploader set features a combination of hard plastic toploaders, soft trading card sleeves, and resealable sleeves to securely hold and protect your cards. The clear polypropylene material allows for easy viewing and identification of your cards, making it a convenient and reliable choice for any card collector.