Most married Chabad hasidim wear a long black frock coat called "Kapoteh", which has a slit in the back and one corner of the hem rounded off, in order that the garment should not require Tzitzis.
Most married Chabad hasidim wear a long black frock coat called "Kapoteh" instead of a bekishe. Addiyionally, one corner of the slit "Kapoteh" hem is rounded off, in order that the garment should not require Tzitzis.