Trauma pads come up for anyone who wears body armor, in law enforcement, the military or as a civilian. CJTTEC, which administers the Compliance Testing Program for NIJ, describes trauma packs and plates as intended to reduce blunt force trauma injury to the torso resulting from a bullet striking the armor.
One note before the rest: "trauma pad" is also the name of a medical dressing, the sterile absorbent pad in a first aid kit used to control bleeding. That is a different product with a different job. This article is about the insert worn with body armor. ArmorList reports what the records show; it never ranks or endorses a product.
What are trauma pads
A trauma pad, also sold as a trauma pack, trauma plate or backer, is an insert worn behind a ballistic panel. When armor stops a bullet, the bullet still pushes the armor into the body behind it, and published research describes injuries under armor even when nothing penetrated. A trauma pad is worn to address that.
A trauma pad does not stop bullets. CJTTEC states that trauma packs and plates do not provide additional ballistic protection. A pad sits behind the ballistic panel, not in place of it.
The names are used loosely. A plate backer can also mean something else: some rifle plates are tested in conjunction with (ICW) a specific soft armor model, and CJTTEC says an in-conjunction plate should be used only with the soft armor it was tested with. That soft armor is part of the tested pair; a trauma pad is not. For more, see What Are Ballistic Panels?.
Material and construction of trauma pads
We found no NIJ or CJTTEC source that describes what trauma pads are made of or how they are layered (checked 1 October 2026). Makers state the materials and construction of their own products, and those are the maker's declarations, not test results.
Our advice: ask the maker what the pad is made of, whether it was tested with your armor model, and for the lab report behind any performance claim. For the materials of hard plates, which are a different product, read Materials Used in Armor Plates Explained.
How trauma pads work
A trauma pad is meant to spread and reduce the force that reaches the body behind a stopped round. Published research supports the idea in at least one setting: a 2009 animal study in the Journal of Trauma (Sondén et al.) reported smaller lung contusions with a trauma attenuating backing behind ceramic and aramid armor shot with a 7.62 mm rifle. That is one study, with one backing behind rifle armor; it does not show what a given pad does behind a given vest.
We found no NIJ or CJTTEC source that measures how much a trauma pad reduces injury (checked 1 October 2026); the one animal study we read is set out below.
What NIJ tests, and what it does not
NIJ tests and lists armor by model, and a listing covers that model as tested. CJTTEC states that the Compliance Testing Program does not test trauma packs or plates, either separately or in conjunction with soft armor models.
CJTTEC says two more things about accessory panels, such as groin and coccyx panels, which the program also does not test:
- A manufacturer may have an accessory panel tested at an NIJ-approved laboratory, but the results stand on their own and are not certified by NIJ.
- An accessory panel should never appear in a catalog or on a website designated as "NIJ Level" anything. In our view, the same caution applies to a trauma pad, which the program does not test either.
Blunt trauma is measured on the armor itself. NIJ 0101.06 sets the maximum backface deformation at 44 mm, with a statistical allowance above it and an absolute limit of 50 mm, and NIJ Standard 0101.07 keeps the 44 mm limit. A model's backface results were measured on the armor as tested; a pad added later was not part of that measurement unless the manufacturer tested it that way. For how the levels are defined, see Breaking Down Hard Body Armor Levels.
Different sizes and shapes of trauma pads
We found no NIJ or CJTTEC source for trauma pad sizes or shapes (checked 1 October 2026). Our advice: follow the armor manufacturer's instructions on whether a pad may be used with that model and where it goes, and check that the pad does not push the ballistic panel out of position or reduce its coverage. Recheck fit with the pad in place, standing, seated and moving. For hard plates, see How to Properly Size Armor Plates.
Comparing trauma pads with other padding options
We found no NIJ or CJTTEC source that compares trauma pads with thicker vest padding or with spall liners, or that distinguishes a pad from a plate by what it does (checked 1 October 2026), so we make no claim about which reduces blunt trauma more. A claim that one product absorbs more energy than another is a claim for the maker's test report, with the lab, the method and the armor it was tested behind.
Benefits of using trauma pads
What a source says: CJTTEC describes trauma packs and plates as intended to reduce blunt force trauma injury to the torso. What the sources do not say: we found no NIJ or CJTTEC source that measures that reduction, or that says a trauma pad reduces backface deformation, makes armor more comfortable or reduces fatigue (checked 1 October 2026).
Practicality and convenience of trauma pads
CJTTEC's statement that the program does not test trauma packs in conjunction with soft armor models means no NIJ record shows a given pad working with a given vest. In our view, compatibility is a question for the armor manufacturer: ask whether a pad is allowed with your model, and keep that answer with the armor's record.
Conclusion
A trauma pad is a blunt-force insert, not a ballistic upgrade. CJTTEC describes trauma packs and plates as intended to reduce blunt force trauma injury; the program does not test them, they add no ballistic protection, and so they carry no NIJ level.
Before adding one, check the armor model's record: where a buyer, policy or funder such as BJA's Bulletproof Vest Partnership (BVP) requires NIJ compliance, its status on the Compliant Products List (CPL) with the date you read it. 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. Then ask the armor manufacturer whether a pad is allowed with that model, and ask the pad's maker for the lab report behind any claim. For more, read A Guide to Using Trauma Pads.
Sources
- CJTTEC, Body Armor FAQs (read 2026-10-01)
- CJTTEC, CTP 2015-02, Flexible Armor for In Conjunction Testing (read 2026-10-01)
- NIJ, Compliant Products List: Ballistic Resistant Body Armor (read 2026-09-29)
- NIJ, Ballistic Resistance of Body Armor, NIJ Standard-0101.06 (PDF) (read 2026-09-29)
- NIJ, Ballistic Resistance of Body Armor, NIJ Standard 0101.07 (read 2026-09-29)
- Wilhelm M, Bir C. Injuries to law enforcement officers: the backface signature injury. Forensic Science International, 2008 (PubMed) (read 2026-09-29)
- Sondén A, et al. Trauma attenuating backing improves protection against behind armor blunt trauma. Journal of Trauma 67(6), 2009 (read 2026-10-01)