Does RFID wallet or any other wallet that suggest to be protecting contain any chemical addictive or have a different composition of material so that they can protect against unauthorized card reading?
Lots of chemicals in leather, though. Veg tan leather has fewer than chrome tan leather. Most consumer leather wallets are chrome tan. The residual chromium has no effect on radio waves though.
A shield is glued between the various layers of leather or whatever material the wallet is made from.