Professional security protection aluminum foil RFID card holder
http://www.sinkeryfoam.com/new-design-tear-resistant-shielding-rfid-card-sleeve-p-109.html
RFID Blocking Sleeve will keep credit and bank cards safe from potential identity thieves. The wafer thin RFID blocking alumina/poly/paper composition material protects card data and personal information from RFID readers. Simply slip your credit and bank cards into the lightweight credit card RFID blocking sleeve which is so slim you can still keep your cards in your wallet, purse, money belt etc…
RFID readers can be bought easily and cheaply online by anyone… bank card data including account name, issue/expiry date and account number can be read by a concealed hand held RFID reader from up to 3m away without you knowing.