I have a passport case and a wallet from DIFRWear. I don't carry my passport everyday, but my public transportation card works with RFID and it's definitely not

I have a passport case and a wallet from DIFRWear. I don't carry my passport everyday, but my public transportation card works with RFID and it's definitely not working when kept inside the wallet. Surely it could be read when I'm actually using it to get in the station, but once in my pocket there's no way to copy or read it. I haven't had the occasion to try the shielding of the passport case either.