noun
soft bra; wireless bra; unpadded bra
A bra without underwire, padding, or hooks, often worn for comfort or sleep. The term is a direct loan from English.
最近、ソフトブラが楽で気に入っている。
Lately I've been liking soft bras because they're comfortable.
旅行のときはソフトブラを持っていく。
I take a soft bra when I travel.