雨衣 (yǔ yī): レインコート; 雨を防ぐために着る防水コート

It's raining; remember to put on a raincoat when you go out.

This raincoat is too small; do you have a bigger one?

He cycles to work every day, so he always carries a raincoat in his bag.

This kind of raincoat is very light and can be folded into a backpack.