You might like to think twice before you pile on all those clothes to avoid paying excess baggage charges.

Kiwi fashion designer Bruno Harding managed to stash seven kilograms of clothes in a specially designed coat on a flight from Germany to New Zealand.

Air New Zealand's chief safety officer David Morgan told Mike Yardley it's not safe.

"Quite a clever idea and very innovative, but not a good idea when it comes to aircraft performance I have to say."

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