Traditional Chinese etiquette filial Piety dressing and filial Piety arm wear are generally the same except for some different rural custom requirements. There are also some basic requirements for traditional Cantonese filial piety dressing and arm wear.
However, as times go by, the traditional Cantonese filial piety dressing has gradually been replaced by simple white clothes and black pants. What has not been replaced is that etiquette of wearing filial Piety arm wear can still be retained and not be eliminated. If the deceased is a male, arm filial piety should be worn on the left sleeve of the family members, and if deceased is a female, it should be worn on the right sleeve of the family members.
The following is a reference for the traditional Cantonese filial Piety arm wear.