Kelvoris RFID Vegan Bifold Wallet. What is the storage capacity of the coin zipper bifold wallet?. RFID Blocking Technology: Equipped with advanced RFID-blocking lining, this female wallet protects credit cards and IDs from digital theft; Reinforced stitching and dual closures with snap and zipper ensure valuables stay safely organized in crowded spaces; A practical choice for commuters, travelers, or anyone who cares about security.