An RFID money belt protects its contents from the possibility of thieves scanning the RFID (radio frequency identification) chip on your passport and/or credit cards and therefore stealing your sensitive data. RFID protection can be built-in by using fabrics capable of blocking RFID scanners, or it can come in the form of separate RFID-blocking sleeves. If your belt includes the latter, you must place your cards and passport inside the sleeves before putting them in the belt.