Big Skinny's ultra-thin, incredibly durable wallets are now available in limited styles with RFID protection built-in to the lining. Radio-frequency identification is a type of technology that uses electromagnetic fields to discreetly transfer data. The sketchy man behind you in the grocery store line or the elderly woman sitting next to you on the bus could be identity thieves, silently harvesting your sensitive information using silent technology. Protect yourself against this type of violation by using a wallet that's lined with RFID blocking materials. The lining used in our RFID wallets is virtually undetectable to the untrained eye and does a superb job of blocking radio waves so you can feel safe when traveling or going about your day.