וְאֵ֨לֶּה הַבְּגָדִ֜ים אֲשֶׁ֣ר יַעֲשׂ֗וּ חֹ֤שֶׁן וְאֵפוֹד֙ וּמְעִ֔יל וּכְתֹ֥נֶת תַּשְׁבֵּ֖ץ מִצְנֶ֣פֶת וְאַבְנֵ֑ט וְעָשׂ֨וּ בִגְדֵי־קֹ֜דֶשׁ לְאַהֲרֹ֥ן אָחִ֛יךָ וּלְבָנָ֖יו לְכַהֲנוֹ־לִֽי׃
A oto szaty, które zrobić mają: Napierśnik, i naramiennik, i płaszcz, i szata spodnia przetykana, zawój i pas. I zrobią szaty te święte Ahronowi, bratu twojemu, i synom jego, aby Mi go przysposobić na kapłana.
Mishneh Torah, Vessels of the Sanctuary and Those Who Serve Therein
The golden garments are the garments of the High Priest, and they are eight garments: The four of an ordinary priest, 5) the cloak, 6) the ephod, 7) the breastplate, and 8) the forehead plate. The sash of the High Priest was embroidered and was made in a similar manner as that of the ordinary priest. [Similarly,] the hat [that the Torah mentions] with regard to Aaron corresponds to the hat mentioned with regard to his sons. [The difference is that] the hat of the High Priest is worn like fabric swathed around a hernia (turban), and the hat of an ordinary priest is worn like an ordinary hat. Therefore, it is called 'migba'at.'
Sefer HaChinukh
The commandment of wearing the priestly clothes: That the priests were commanded to wear special clothes for aggrandizement and glory — and then they may serve in the Temple — as it is stated (Exodus 28:4), “and they shall make priestly clothes for Aharon your brother and his sons.”