The 1000 Count Ultra PRO 2.5" x 3.5" Penny Sleeves Standard are clear, soft sleeves made of polypropylene material. Designed for standard-sized cards, these sleeves are compatible with card thicknesses of 35 Pt. Each sleeve can hold one card and is acid-free, ensuring the longevity of the cards stored inside. With a total of 1000 sleeves included in the pack, this product is ideal for organizing and displaying cards for various games such as Pokemon, Magic, and sports trading cards. Made in the United States by Ultra PRO, these sleeves provide a secure and protective storage solution for your collection.