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The Curious Bag
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Bulletproof vests may contain Kevlar or other tough, lightweight fibers, as well as plates of metal and other rigid materials. Vests will vary depending on what kind of bullets or projectiles they are designed to withstand.
Resistance to Bullets
Bulletproof vests are more accurately called bullet-resistant vests, since no body armor can withstand all bullets. Vest fibers serve to dissipate the force of the bullet and prevent it from penetrating the vest.
Kevlar
Kevlar is a lightweight plastic that is resistant to stretching. This quality ensures that a bullet cannot easily force interwoven Kevlar fibers apart.
Other Modern Fibers
Fibers that are reportedly thinner, lighter, and more bullet-resistant than Kevlar have been introduced for use in protective vests. They include Dyneema, Twaron, and GoldFlex.
Trauma Plates
Vests for use by the military have steel, titanium, ceramic, or polyethylene plates to further protect vital areas from bullets. These are called trauma plates.
Future Materials
Still in the testing stage are new materials like artificial spider silk and a material based on very fine tubes of tungsten disulfide. These materials are stronger and flexible, yet light.
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