RFID blocking is extremely important to travelers who fear having their info digitally stolen. This passport holder is RFID-lined and protects against unwanted scans, ensuring that your credit cards remain private. Make an inventory of what you want around your neck. Passport holders can carry much more than your passport and a few cards; some can cram everything you might possibly need short of a change of clothes into a seemingly impossible space, and that might come in handy for situations, like the beach, where you’d rather not have anything in your trunks. If you want to more evenly distribute your stuff, however, there are options that will hold your passport and a few cards.