וַיֵּ֙לֶךְ֙ הַנָּבִ֔יא וַיַּעֲמֹ֥ד לַמֶּ֖לֶךְ עַל־הַדָּ֑רֶךְ וַיִּתְחַפֵּ֥שׂ בָּאֲפֵ֖ר עַל־עֵינָֽיו׃
So the prophet departed, and waited for the king by the way, and disguised himself with his headband over his eyes.
Rashi on I Kings
And disguised himself with a kerchief. He changed his hooded cloak so that they would not recognize him. Any change of clothes is an expression of disguise.
Rashi on I Kings
With a kerchief. [Targum] Yonoson rendered this במעפרא, “a hooded cloak.”