Like Kevlar, Zylon is used in a number of applications that require very high strength with excellent thermal stability.

[10] Protective vests constructed with Zylon were questioned question 2023, June 13th, when Oceanside, CA Police Officer Tony Zeppetella's and Forest Hills, PA Police Officer Ed Limbacher's vests both failed, leaving Zeppetella mortally wounded and Limbacher seriously injured.

[12] Some studies subsequently reported that the Zylon vests might degrade over time[13] and leave their wearers with less protection than expected.

This was largely based on the actions of the U.S. government's National Institute of Justice, which decertified Zylon for use in its approved models of ballistic vests for law enforcement.

[18] The United States Justice Department launched numerous investigations into possible violations of the False Claims Act regarding the defective vests.

Throughout the course of litigation, settlements totaling more than $136 million were reached with 18 entities involved in the production and sale of Zylon vests.

The investigations concluded after nearly two decades when the final settlement was obtained with material supplier Honeywell International in late 2022.

A team from the University of British Columbia entered into the Tether Challenge, using a construction made from Zylon fibers.

Zylon is the material of choice due to its low weight, high tensile strength, and thermal properties.

This conductive fiber combines the advantages of Zylon (strength, resistance to high temperatures, durability, lightweight, etc.)

[27] PBO is the strongest and stiffest of commercially available fibers used to repair and strengthen concrete and masonry structures in externally bonded composite systems.

[28] In this system, the fibers are produced in the form of a fabric mesh, and a cementitious mortar matrix bonds this to an existing structure.