New Technique Turns T-Shirts into Body Armor -- Live Science
Those bulky, bulletproof vests could become a thing of the past. Their replacement: Your T-shirt, but with a special coating. Bulletproofing can be done in one of two ways. The first, old-school approach relies on hard plates of metal or ceramic, which deflect oncoming bullets. A more elegant way, perhaps, is the use of a network of fibers – the approach taken by Kevlar – to “catch” the bullet, much like a hockey goalie catches a flying puck.
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My Comment: The impact will probably break bones and cause massive bruising, but it will still be infinitely better than the alternative .... which is bullet penetration and fragmentation.