Kri'a: How Often for a Parent

When mourning for a parent, you must tear kri'a throughout the shiv'a week whenever you change shirts, so it is best to change garments as little as possible! You must wear the torn garment during the entire week of shiv'a. Coats do not require kri'a.
Note Wearing a torn black ribbon pinned to a garment does not fulfill the requirement of kri'a.