I’ve only worn it with the innerwear. I bought an extension sheath with no baseband to wear with it as well.
If you wear with the normal innerwear the mag volts main function is when all the metal parts are touching your skin.
The salt and other stuff on your body creates a bridge for the electric circuit to complete and causes the effect. If the mag volt is on top of fabric I can’t imagkne it would work as well.