The Eagle Creek RFID Blocker Holster uses Radio Frequency Identification (RFID) blocking technology to make sure that your passport and credit cards cannot be digitally scanned by electronic thieves. All passports since 2006 and many credit and bank cards contain RFID chips to store your data. Much like a traditional neck wallet, this one also secures your cash and cards, tucking everything under your clothing, with the added RFID-blocking protection. The RFID Blocker Holster features a zippered main compartment as well as a back slip pocket to help keep you organized. The durable and lightweight nylon ripstop will last through many adventures, while the breathable and moisture-wicking back panel keeps you cool and dry. And, an adjustable neck and shoulder strap will make sure the pouch sits right where you want it to.