Security Credit Card Protection Sleeves & Passport Holders - 12 Piece Set - Premium Materials Protective Sleeve for blocking RFID communications from scanners used by thieves. Your cards can be read while in your pocket, wallet or purse. Today's smartphones have the technology to do that. Your card's data on that phone can then be used to make purchases on the new type of POS terminals. It's called electronic pickpocketing. *We all need knowledge of and real protection from this form of data and identity theft. 10 Credit Card Sleeves + 2 Passport Sleeves. Strong deterrent against identity and data theft. Super nice quality and appearance. Classy. Copper and Aluminum shielding material to protect credit & debit cards, enhanced I.D. and ePassports from electronic pickpocketing from wireless devices that can collect your data through your wallet, purse or pocket. Sturdy and easy to use. Not flimsy but still fit in wallet slots. After implementing them into your wallet, in a couple days they adapt to where you carry them. Good construction with great design so that the seam doesn't come apart.