That is not my vest. My vest is red.

那不是我的背心。我的背心是红色的。

youdao

He went upstairs and put on the coat and vest Coming down, he looked strange in a flannel collar and a flannel shirt - front, with an evening coat and vest it was rather large.

他上楼去穿上晚礼服的上衣和背心。下楼来时，只见他那晚礼服上衣和背心露出法兰绒衬衫的前襟和衣领，样子看起来很怪。衣服太肥了。

youdao

Now the fight attendants will explain the use of life vest, Please take your life vest on and follow the instruction of your fight attendants'But do not inflate it while you are in the cabin.

现在乘务员将向您演示救生衣的使用方法， 请旅客们随同乘务员的演示穿上救生衣， 在客舱内不要充气。

youdao

In everyday speech, holding your cards close to your vest means not letting other know what you are doing or thinking.

VOA: special.2009.11.22

You can do a better job of bluffing if you hold your cards close to your vest.

VOA: special.2009.11.22

An unexploded suicide bomb vest was found at a third location, a disco club.

VOA: special.2010.07.17

Jones was wearing a bulletproof vest, but one bullet hit just below the vest, and the injury proved fatal.

FORBES: The Freedom of Cory Maye

Standout pieces included a suede quilted lamb vest, a spruce-green fairisle shawl collar sweater and wool herringbone striped trousers (above) and a laser quilted bomber vest with charcol trousers (left).

FORBES: Perry Ellis: Texture for the Country Gentleman

By the way, the fleece vest over a button-down shirt thing originated at SAC.

FORBES: Dress for Success on Wall Street