If I take off my Tallis to go to the bathroom, do I make another Bracha when I put it back on?
No, unless you completely diverted your attention from putting it back on or if a few hours have passed.
Regarding Tefillin – see here:
If I take off my Tefillin to go to the bathroom, do I make another Bracha when I put it back on?
Source:
Alter Rebbe’s Shulchan Aruch 8:23-25.
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