down vest

US /ˈdaʊn vest/
UK /ˈdaʊn vest/
"down vest" picture
1.

羽绒背心, 羽绒马甲

a sleeveless jacket that is padded with down or synthetic fibers for warmth

:
He wore a down vest over his flannel shirt.
他在法兰绒衬衫外面穿了一件羽绒背心
A lightweight down vest is perfect for chilly autumn days.
轻便的羽绒背心非常适合寒冷的秋日。