Recognizing the signs of damaged body armor matters to anyone who wears it, in law enforcement, security, or for personal protection. Body armor is made to reduce the risk of injury from specific threats, and damage, poor care and wear can affect it.
For those who depend on body armor, knowing what to look for, and what an inspection cannot tell you, is part of owning it. NIJ warns against assuming that an appearance of good condition implies good performance.
In this article, we cover the basics of body armor, common causes of damage, how NIJ advises inspecting it, and when to replace it.
Understanding body armor basics
Body armor comes as soft armor (flexible fiber panels) and hard armor (rigid plates). NIJ Standard 0101.07 rates ballistic armor at handgun levels (HG1, HG2) and rifle levels (RF1, RF2, RF3), defined in NIJ 0123.00. CJTTEC, which administers the NIJ Compliance Testing Program, says NIJ 0101.07 names its levels "HG" for handgun and "RF" for rifle, with "a reduction in soft-armor levels and an additional hard-armor protection level". For more, see Breaking Down Hard Body Armor Levels.
Soft and hard armor show damage differently, and NIJ's inspection advice treats them separately, so it helps to know which you have.
All body armor models on NIJ's Compliant Products List are warrantied for their ballistic performance by the manufacturer. CJTTEC notes that the warranties identify the specific period of ballistic performance but are not evaluated by NIJ's Compliance Testing Program. For more on this topic, read Understanding NIJ Body Armor Standards.
Side note: NIJ certifies ballistic body armor for law enforcement, model by model, and lists compliant models on its Compliant Products List. That listing answers one question, whether a model met NIJ's program; other standards and accredited-lab reports are judged on their own evidence. Neither tells you the condition of the vest in front of you: inspection does that, within its limits.
Common causes of body armor damage
The sources name impacts, the environment and handling. NIJ says a vest struck by a bullet or edged weapon can have damage not only to the carrier and cover but to the interior layers of ballistic fabric. Hard plates, particularly those with ceramic, may be fragile: dropping ceramic plates on hard surfaces can cause breaks or cracks that can have an adverse effect on performance.
On the environment, NIJ says ballistic performance may be degraded if armor is exposed to moisture and that ultraviolet light is known to degrade certain types of ballistic materials, and it warns against storing armor where it may be exposed to extreme temperatures. NIST has studied how heat in storage and use can reduce the strength of UHMWPE (polyethylene) fibers. See Does Temperature Affect Body Armor Performance?.
Use counts too. NIJ notes that wear and tear from normal use can contribute to deterioration, and CJTTEC that a vest may need replacing before the end of its warranty period because of heavy use that caused wear and tear over time.
Visual signs of wear and tear
For soft armor, NIJ advises visually inspecting the ballistic panel covers frequently for cuts, tears, stitching separation, sealing problems and worn or frayed fabric due to excessive wear. NIJ advises never opening the covers of armor panels: if a cover's integrity is compromised in any way, contact your agency representative.
For hard plates, NIJ advises a visual inspection before each use for surface cracks or other signs of damage, and says damage to a plate is a clear indicator that it should be replaced. Checking for chips, dents and delamination at the edges and cover is our advice.
Check the label too. NIJ advises inspecting it often and contacting the manufacturer about a replacement if it becomes illegible: identifying the model matters in a safety recall.
A visual check only finds what shows. NIJ's warning applies here: an appearance of good condition does not imply good performance.
Impact of improper storage
Storage is part of care. NIJ advises against needlessly flexing, bending, compressing or creasing soft panels, which may contribute to degradation of ballistic materials over time, and advises storing armor flat at room temperature in a dry, shaded place.
NIJ also warns against storing armor in the trunk of a vehicle (CJTTEC adds prolonged direct sunlight), in low-airflow spots such as the bottom of a locker, or hanging it by its carrier straps. For tips, see How to Store Body Armor Safely.
NIJ calls maintaining and storing body armor according to the manufacturer's instructions key to its continued performance.
Effects of exposure to harsh chemicals
NIJ advises against chemicals other than those the manufacturer specifies, and says bleach or starch, even highly diluted, may reduce the protection level. It also says detergents, dry-cleaning solvents and laundry equipment can damage or degrade panels.
Clean panels only as NIJ's general procedure and the maker's instructions describe: wipe the outer cover with a damp sponge or soft cloth and cold water, and air-dry flat. NIJ advises against rinsing, soaking, submerging or spraying panels. If armor has been in contact with a chemical, our advice is to report it to the agency representative or the maker before it is worn again, and not to rinse the panels.
Importance of regular inspections
NIJ advises inspecting panel covers frequently, hard plates before each use, and involving supervisors in the inspection of body armor. In our view, a routine also helps you notice changes in your own armor over time.
If you notice anything unusual, NIJ advises notifying your agency representative about any panel or label showing damage or excessive wear, and never attempting to repair armor panels.
When to consider replacing your body armor
CJTTEC says a vest struck by a bullet or edged weapon should be replaced immediately, and NIJ that damage to a plate is a clear indicator that it should be replaced. A vest may also need replacing before the end of the warranty period because of a change in the officer's weight and body shape, a different service weapon or ammunition threat, or heavy wear.
The label date is the manufacturer's warranty period. CJTTEC advises knowing it and replacing the vest in a timely manner, and NIJ advises reporting armor beyond its declared warranty period to the agency representative. Agencies plan around replacement: BJA describes vest replacement cycles as usually 4 to 5 years. NIJ also advises against removing serviceable armor from service until a replacement is available for immediate wear. For more, read How Long Does Body Armor Last?.
Conclusion and final tips
Inspect often, store and clean as the maker and NIJ describe, and report what you find. Our advice: follow the manufacturer's care instructions, ask the maker when in doubt, and do not take a clean appearance as proof of condition.
When you replace armor, check the model you are buying. ArmorList's product records show the standards a model is recorded as tested to and, for NIJ, its CPL status with the date the list was read.
Sources
- NIJ, Body Armor Selection, Care, and Maintenance (NCJ 251599) (read 2026-10-01)
- NIJ, Selection and Application Guide to Ballistic-Resistant Body Armor (NIJ Selection and Application Guide-0101.06, December 2014, NCJ 247281), chapter 8 (PDF) (read 2026-10-01)
- CJTTEC, Body Armor Care and Replacement (read 2026-09-30)
- CJTTEC, Additional Information Regarding NIJ Body Armor Compliant Product List (read 2026-09-29)
- NIJ, Factors That Impact the Effectiveness of Body Armor (read 2026-09-30)
- NIJ, Compliant Products List: Ballistic Resistant Body Armor (read 2026-09-29)
- NIJ, Specification for NIJ Ballistic Protection Levels and Associated Test Threats, NIJ Standard 0123.00 (read 2026-09-29)
- CJTTEC, New Ballistic-Resistant Body Armor Standard Published (read 2026-10-01)
- BJA, Mandatory Wear FAQs (read 2026-09-29)
- Tsinas et al. (NIST), Effects of Thermal Aging on Molar Mass of Ultra-High Molar Mass Polyethylene Fibers, Polymers (2022) (PMC) (read 2026-09-30)