First of all whatever you buy should be RFID-blocking to prevent electronic skimming of your passport, credi/debit cards, driver’s licence and anything else with an imbedded chip. I carry my passports, credit/debit card, cash,etc. in and RFID-blocking pouch which I wear around my neck and under my shirt or in an RFID-blocking money belt which I wear around my waste under my trousers/jeans/shorts. You can also buy RFID-blocking sleeves for passports and cards. My main concern is pickpockets and other such villains so all I carry in my pocket is some cash and a credit card if the pocket zips closed. I find those lovely looking travel wallets, of which I have two, bulky and insecure, so I don’t use them. I learned to carry my passport, etc. under my clothing from +40 years of extensive domestic and international travel for business and pleasure; RFID-blocking is a more recent necessity, but very important.