Were not these robes worn by the priests to remind the people of the robe of Jesus' s righteousness, and his garments of salvation? Isaiah 61:10; Psalms 132:9-16.
Related Commentaries of Exodus 28:4
Exodus 28:4
4 And these are the garments which they shall make; a breastplate, and an ephod, and a robe, and a broidered coat, a mitre, and a girdle: and they shall make holy garments for Aaron thy brother, and his sons, that he may minister unto me in the priest's office.