There is an inyan to wear it outside and see them but there is also a kabalistic inyan to wear it under your clothes (that explains Chabad) so thats why many chasidim are wearing a vest so its somewhat in between.
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There is an inyan to wear it outside and see them but there is also a kabalistic inyan to wear it under your clothes (that explains Chabad) so thats why many chasidim are wearing a vest so its somewhat in between.