Where is "Sha'arei ha'Chatzer ha'Penimis"?
Rashi: This is Lifnai v'Lifnim 1 (Kodesh ha'Kodoshim; the Kohen Gadol) goes there on Yom Kipur.
Radak: The simple meaning of Chatzer 2 is Ezras Kohanim, the Mizbe'ach and from it to Sha'ar ha'Ulam. All of it is a Chatzer. If so, this is a Chidush for the future. Until now, there was wool in Bigdei Kehunah ? Techeles is wool dyed with] Techeles.
What are "Bigdei Pishtim"?
Malbim: This refers to the Kesones. Verse 18 teaches that also the other three Bigdei Kohen Hedyot were of linen.
Why does it say that they will not wear wool?
Rashi: There was [wool dyed with] Techeles in the Me'il and Avnet; they do not wear them when serving Lifnai v'Lifnim.
What is the meaning of "va'Baysah"?
Rashi: This is inside.
