Try a Wikipedia search and you will find:
Aramid fibers are a class of heat-resistant and strong synthetic fibers. They are used in aerospace and military applications, for ballistic-rated body armor fabric and ballistic composites, in bicycle tires, and as an asbestos substitute. The name is a portmanteau of "aromatic polyamide".
Just found the cool cases on Amazon, but do not know what is aramid? How to judge it is true aramid?
http://www.amazon.com/gp/product/B00U7CPW68
http://www.amazon.com/gp/product/B00Q9O9WW8
Thanks

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