vest
He was so worried about security that he always wore a bulletproof vest.
Guards at the conference are being issued with bulletproof vests.
The police in the city go out on patrol without bulletproof vests or helmets.

SMART Vocabulary: related words and phrases

Protective clothing
armourer
base layer
bike helmet
boiler suit
bracer
face mask
face shield
gaiters
gas mask
gauntlet
life preserver
mouth guard
NBC suit
oven glove
overalls
sun hat
tabard
tactical vest
tin hat
topee