RFID blocking card sleeves are made of paper + aluminum foil materials. It is designed to protect your personal information (credit cards, debit cards, or driver's license) from hi-tech thieves.
With the development of the technology, can you image that when you standing outside, your credit card information are stolen by contactless RFID scanners without awareness? That's why we urgently need a RFID blocking card sleeve. Come on! Just take our high quality blocking sleeves to protect your personal information from now on!
http://www.sinkeryfoam.com/new-design-tear-resistant-shielding-rfid-card-sleeve-p-109.html