down vest
US /ˈdaʊn vest/
UK /ˈdaʊn vest/

1.
a sleeveless jacket that is padded with down or synthetic fibers for warmth
:
•
He wore a down vest over his flannel shirt.
•
A lightweight down vest is perfect for chilly autumn days.

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