3
votes
1answer
77 views

Why do Lubavitchers put on tefillin of Rabbeinu Tam from bar mitzva?

Based on this question, Shulchan Aruch (O"C 34:2-3) says that only people who are noted for their piety should put on Rabbeinu Tam tefillin. Why do Lubavitcher chasidim (and descendants of certain ...
1
vote
0answers
49 views

Why do Tefillin have filler material in the base of the batim?

Mikshah tefillin are tefillin battim which have no filler material in the titurah (base). Why is filler material even necessary? The photo below illustrates the thickness with a piece of filler ...
5
votes
2answers
91 views

Double-black Retzuot [duplicate]

I sometimes see on the net and in person cases where people wear retzuot which are black on both sides, what is the rationale, if any, for doing so?