May one wear the head tefillin with their protective cover on, and must they be put on again if they were worn that way?

This Torah study examines the question: May one wear the head tefillin with their protective cover on, and must they be put on again if they were worn that way? The canonical Hebrew discussion develops the issue through the weekly Torah portion and the sources cited there, preserving the distinctions, tensions and practical implications that belong to the source itself. This localized layer is designed for study and discovery; it does not add a new halakhic, medical, legal, historical or empirical ruling beyond the canonical Hebrew source.