Credit and debit cards with embedded microchips are common because computers can read them quickly and unlike the magnetic strips on cards, chips don’t transmit a large amount of personal data. That protects you against identity theft and fraud, but some thieves use handheld readers to get the numbers and expiration dates of cards embedded with RFID (Radio Frequency Identification) chips. Additionally, U.S. passports issued after August 2007 have embedded RFID chips, which allows for faster movement through borders and customs, but again opens the door to electronic pickpockets. That’s why RFID blocking wallets, which are built with layers of material that RFID readers can’t penetrate, are being used by more and more people. Here are a few types you should consider.