in this case, confusing them

Do you need RFID-blocking protection?
Because RFID credit cards work via radio frequencies, some concern has been drummed up that a card reader could pick up your card information without your knowledge. For this reason, there are quite a few products on the market, such as sleeves and wallets, that claim to have RFID protection.
...
Special RFID-blocking wallets and sleeves, despite their popularity, generally aren’t necessary for security because the technology requires an obstruction-free environment.

https://www.bankrate.com/finance/credit-cards/rfid-credit-ca...

This is what I hear commonly.