RFID Blocking Billfold All newly issued U.S. passports and many credit cards now include an RFID chip (radio frequency identification data) with personal information Effectively blocks RFID readers for security Two section billfold Flap with window for ID 6 card slots Slots for SIM cards 08025 1680 D. Ballistic Nylon with Leather Trim Colors: Black Size: 3.5" x 4.5" x 1" Patent Pending