AlpineSwiss RFID Blocking Leather Passport Cover ID Protection Travel Case Black Measures: 5.5" x 3.75" x 0.25" Fits All Standard US Passports. This cover protects you from being targeted by those who are looking for US citizens. Includes RFID protection and conceals US Passport Seal. Easy secure slip on cover on both sides of the passport like a book sleeve. Passport can be kept wearing cover while handing it to customs agents. RFID PROTECTED: Certified Independent Lab Tests in Met Labs Santa Clara, CA facility. Secure your personal data for credit card RFID Chips operating at 13.56 MHz Frequency while allowing use of 125 KHz Proximity Cards such as ID badges, hotel cards & some transit cards.