Matt Leggett's brainchild measures how much alcohol you have in your system and tells you whether you are fit to drive.
The wearer blows into a nozzle in the collar and a sensor in the jacket's pocket analyses the amount of booze in your breath.
The results are displayed on lights stitched into the forearm of the jacket; the more that glow, the more alcohol is being detected.
Mr Leggett, from Wellington, said: "This project is designed to address the very real problem of driving under the influence of alcohol, something which is especially prominent within New Zealand culture.
"The main aim of the breathalyser jacket is to provide the wearer with enough information regarding the amount alcohol on his/her breath to make a decision on whether driving is in fact a good idea.
"The lights will only glow for a period of around a minute after the breath sample has been taken, enough time for wearer to process the information without becoming a walking light show. To the unfamiliar observer, the jackets function is a mystery."Post published in: World News