Protect you information: The sleeves are equipped with advanced RFID SECURE Technology, a powerful electromagnetically opaque shield, which blocks RFID signals and from unauthorized scans. Protects passports, debit cards, ATM cards, driver's licenses, transit cards ,Metal shielding block UHF 860~960MHz & HF 13.56MHz frequencies, and so on.Simply slim design: Only 6.5* 9.1cm card protector, No cutting or modification required. It is slim enough to fit into credit card slots in wallets, handbags, travel bags and smartphone cases.Water, tear resistant: Enduring resistant material to stand tears and punctures. suitable for daily use. They're even waterproof, so you don't have to worry about them.Easy to test: To check if the Sleeves are working, please just test it with your job card, or other big-box retail store and try them out on the checkout scanner.