These  card holders are designed to shield RFID signals.  Each sleeve protects one credit card, debit card or Identification card. About 100 million credit cards now have "contactless" technology embedded into them. RFID (Radio Frequency Identification) chips in a credit card emit the account number, expiration date and other information. Secure sleeves create an RFID shield by blocking the electromagnetic energy necessary to power and communicate with contactless smart cards.

we have 2 kinds of materials for your choice 

A:aluminum foil+PET+PE 

B:aluminum foil+paper

Factory supply , support wholesale and OEM, good price and fast delivery for you 

good partner for your online shoping selling ,sticker service , packing as your requirement 

RFID blocking card holder  Protect your cards and passport

Best selling online Anti e-pickpocket thieves Credit id card protector/RFID blocking  passport sleeve 

 aluminum foil plastic card sleeves  RFID blocking  protect your information safe  

 support wholesale  online for blank ones