Is it illegal to wear a bullet proof vest through airport security?

Bulletproof vest aren't illegal anywhere as far as I know they do no harm. But would it be a bit suspicious if someone passed through airport security with one on or would the metal ditectors even beep. And can you wear it in the plane to another country. But pratically how would security even know it is a... show more Bulletproof vest aren't illegal anywhere as far as I know they do no harm. But would it be a bit suspicious if someone passed through airport security with one on or would the metal ditectors even beep. And can you wear it in the plane to another country. But pratically how would security even know it is a bullet proof vest it's like a warm jacket . Thnx
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