ITEM NAME:20Pcs passport credit card holder protector blocking shield bags Z Product Description: Material: PET + Aluminum foil + PE Color: As the pictures Size:(L*W):About 10cm*6cm Features: Radio frequency identification (RFID) is a technology that uses communication via electromagnetic waves to echange data between a terminal and an electronic tag attached to an object for the purpose of identification and tracking Prevents electronic pick-pocketing Sleek silver design slides into your wallets card-holder with ease Neutral and inconspicuous design A very thoughtful present to family and friends, also a great gift for company promotions! Package included:20Pcs Credit Card Protector.Material: PET + Aluminum foil + PE. Neutral and inconspicuous design. Sleek silver design slides into your wallets card-holder with ease.