Ezekiel 44:17-19

17When they enter the gates of the inner court they are to wear linen garments; they must not have on them anything made of wool when they minister at the gates of the inner court and within it.

18They are to wear linen turbans on their heads and linen undergarments around their waists. They are not to put on anything that makes them sweat.

19Before they go out to the outer court, to the people, they must take off the clothes they have been ministering in, leave them in the holy chambers, and dress in other clothes so that they do not transmit holiness to the people through their clothes.