RFID Blocking Card Case 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 2 card slots and 1 card compartment Window for ID 82022 1680 D. Ballistic Nylon with Leather Trim Colors: Black Size: 4" x 3" x .5" Patent Pending