How to choose between KEVLAR and SPECTRA

In the last couple of years a lot of improvements have been made, especially in the police and military equipments and gear , improvements that have lead to better safety. The new bullet proof body armor is more comfortable and protective. In the past bulk and discomfort was part of being protected. Thanks to KEVLAR the new body armors for the police and military have greatly reduced weight and size.

However today a new material called SPECTRA has been released on the market and SPECTRA is more flexible, lighter and stronger than KEVLAR. This new substance is changing the face of bullet proof wear for police and the military, but what are the differences and the big advantages of SPECTRA?

Let's first examine the structure of each of the two materials. Kevlar is a high strength, high performance fiber that, despite its many years of use in bullet proof clothing, is still not entirely understood. The best description of how it is believed to function is that the molecules form into sheets that then stack themselves around the center of a fiber like spokes. The idea behind using this as a bullet proof material was to stack several layers of the material together in a weave pattern.

The weaving would then "catch" the bullet by allowing the fibers to break apart layer by layer and absorb the velocity, slowing the bullet to a stop as it also dulled and flattened from striking the material. However, this was mostly effective when bullets were slower and had less total velocity, making them easier to stop. Now, our troops and law enforcement officials face much more technically advanced weaponry with bullets flying at higher speeds and constructed from harder metals.

Kevlar vests are stretched to their limits and beyond by modern day weapons and bullets and from time to time they get penetrated completely by very forceful guns. The only way to solve this problem with Kevlar is to add more layers of Kevlar to the material resulting again in bulky, heavier and less flexible bullet proof vests.

Spectra is a completely new and different technology. Spectra is about 40% lighter than Kevlar which makes it a lot more comfortable. Spectra is not been woven which only helps reducing even more the weight and bulk as there is no need for several layers.

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