Do RFID Credit Card Blocking Sleeves Work?

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RFID Blocking Sleeve Anti Theft 4 Credit Card & 2 Passport Holder Wallet Pocket
by Seameseames

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, credit cards, 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 6.4* 9.3cm card protector, 10.6*13.5cm passport 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.

Nowadays, More and more credit cards and passport have RFID chips.
To protect your valuable information from stealing, it is a good choice to have this RFID credit card secure protector and passport holder. It is valid to avoid unauthorized scans and block the ability to scan account numbers, PIN numbers, license numbers, names, addresses, dates of birth, and much more.
Package included:
4* Credit Card Covers
2 * Passport Protectors
Size:
3.62 x 2.44inch for credit card holder
5.3 x 4.17 inch for passport holder