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FAQs > Zylon®-based Body Armor

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Do the upgrade kits offered with certain models of Zylon®-based body armor ensure the armor's performance throughout the warranty period?

Through its research, NIJ has found that the upgrade kits, tested in conjunction with used Level IIIA armor, experienced bullet penetrations. Excessive backface signatures (BFS) were recorded for all three of the primary threat levels (Levels IIA, II, and IIIA) during this testing. The excessive BFS measurements, along with the bullet penetrations experienced in the Level IIIA armor, would be considered unacceptable if the armor were new and tested in accordance with the NIJ Standard.

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