The primary reason these wallets are becoming so popular today and in the future, is that the stainless steel material blocks all RFID radio frequency signals. Credit Cards are rapidly becoming equipped with RFID chips embedded in them. In a traditional leather wallet, someone with a RFID capturing device could compromise your credit card information without you ever knowing it. These Stainless Steel Wallets block all the RFID waves and keep your personal information safe and secure!