RAV KOOK ON PARSHAS KEDOSHIM PART 1

(PLEASE LEARN THIS FOR A REFUA SHELAMA FOR THE GEDOLIM Rav Elyashiv -Yosef Sholom ben Chaya Musha, Rav Shteinman - Aaron Yehuda Leib ben Gitel Feiga, Rav Weiss - Yitzchak Tuvia ben Rikal, Rav Belsky - NAME ADDDED Chaim Yisroel ben Chana Tzirtel, Rav Yosef - Yaakov Chai ben Margalit Harav Shlomo Leib Ben Miriam - HaRav Shlomo Brevda Harav Yeshaya Yaakov Ben Raizel - HaRav Yeshaya Yaakov Portugal Harav Meshulem Fish Ben Tziril - The Toshe Rebbe Harav Yitzchok Issac Ben Treina - HaRav Isaav Ausband Rav Yerachmiel Shlomo Hakohen ben Raizel. -Rav Yerachmiel Shlomo Rothenberg, rosh yeshiva of Yeshiva of Mountaindale Rav Shaul ben Pasha-Gavaad Zurich, Switzerland and rav of Beis Medrash Agudas Achim for a refuah shleima b’soch kol cholei am Yisrael.)

While first introduced here in Lev. 19:19, the prohibition of sha'atnez is more clearly defined later on in the Torah: "Do not wear sha'atnez — wool and linen together" (Deut. 22:11). Why does the Torah prohibit using wool and linen in the same article of clothing? Also, the special garments of High Priest contained both wool and linen. Why was he allowed to wear sha'atnez?