Turns out, bulletproof suits are a real thing and has been existing in the Garrison Bespoke's showroom since 2014. Garrison Bespoke makes a stylish bulletproof suit that is not made from Kevlar(the material bulletproof vest are made from) but looks like an everyday normal suit and can stop a bullet to an extent.

Is it illegal to wear body armor in public?

While most states abide strictly by the federal law regarding body armor, there are a few that add their own bit of flair to it. However, the purchase and use of body armor, by civilians in general, is legal. Again, if you're convicted of a violent felony, it's illegal unless you fall into the exception.

How effective are bulletproof suits?

Bulletproof vests are body armours that prevent bullets or shrapnel from penetrating the human body. They are also effective in protection against knife attacks. ... Although the user of the vests still receives bruises and broken ribs from the impact of bullets, it is much better than a gaping hold in your body.