Ultra PRO's original clear Soft Trading Card Penny Sleeves® are made with non-PVC, acid-free, and archival-safe polypropylene film, ensuring the protection of your valuable trading and gaming cards from dust, dirt, and natural oils during handling and storage. These sleeves are designed to hold standard size (2-1/2" X 3-1/2") trading cards up to 35 points in thickness and minimize surface scratches during sorting, display, and gameplay. As the original "Penny Sleeves", they provide superior protection for your valuable cards while maintaining a professional and educational tone.