noun
A coat or outer garment worn to protect against rain. A straightforward noun with no special usage restrictions.
雨が降りそうだから、雨着を持って行ったほうがいいよ。
It looks like rain, so you'd better take a raincoat.
彼は黄色い雨着を着て外に出た。
He put on a yellow raincoat and went outside.