[Avodah] covering tfilllin shel yad

[Joel Rich]

In a recent Q&A session Rabbi Shmuel Fuerst mentioned that while there
is no requirement to cover your tfillin shel yad, the practice is to
do so by pulling down your shirt sleeve immediately after putting on
the tfillin shel yad. He quoted sources that a number of gdolim were
reported to do so but did not quote a reason for the general practice
or for doing it immediately rather than after putting on the shel
rosh. I would have thought reducing the time between putting on the
shel yad and rosh would be a factor.

I had heard in the name of the R'YBS that one should return to their
original dress state (eg not have one sleeve of the jacket on and one
off)


Have you heard any reason for either practice or how common they are?

KT
Joel Rich