וְעָשִׂ֙יתָ֙ יְרִיעֹ֣ת עִזִּ֔ים לְאֹ֖הֶל עַל־הַמִּשְׁכָּ֑ן עַשְׁתֵּי־עֶשְׂרֵ֥ה יְרִיעֹ֖ת תַּעֲשֶׂ֥ה אֹתָֽם׃
And thou shalt make curtains of goats’hair for a tent over the tabernacle; eleven curtains shalt thou make them.
Rashi on Exodus
יריעת עזים CURTAINS OF עזים — i. e. GOATS HAIR (cf. Rashi on Exodus 25:4).
Sforno on Exodus
לאהל על המשכן. The purpose of what was called משכן had not been to serve as a tent, but to assure that the cherubs would be surrounding the Shechinah.