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 Tzitzit.
Most married Chabad hasidim wear a "Kapoteh", a long black frock coat which is nearly identical to a "Bekishe". The "Kapoteh" has a slit in the back and one corner of the hem rounded off, in order that the garment should not require Tzitzit.