The physical destruction or decomposition of chemical protective clothing material due to exposure to chemicals, general use, or ambient conditions defines:

• A. Degradation
• B. Permeation
• C. Breakthrough
• D. Absorption

Answer: (A)

Degradation means the physical destruction or decomposition of chemical protective clothing material caused by exposure to chemicals, general use, or ambient conditions. This matters because when the material degrades, its barrier integrity can be compromised, reducing protection even before any chemical has fully permeated. Permeation is the process of a chemical moving through the material at the molecular level, which is about transport rather than damage to the material. Breakthrough refers to the point at which the chemical is detected on the inner surface, signaling that the barrier has been breached, and Absorption is the chemical being taken up into the material itself. In short, degradation is the term that describes the actual damage to the fabric that can undermine protection.