Last updated July 21, 2026. By the Code 4 Uniforms Team.
Body armor has saved the lives of more than 3,000 law enforcement officers in the United States since 1987, according to data from the National Institute of Justice and Bureau of Justice Assistance. That number keeps climbing. Yet according to a survey by the Police Executive Research Forum, only 59 percent of law enforcement agencies require their officers to wear body armor at all times on duty. Understanding what each soft armor level actually stops is the first step toward making sure the vest you're wearing matches the threats you face on patrol.
Key Takeaways
- NIJ Standard 0101.06 defines three soft armor levels for daily wear: IIA, II, and IIIA. Level IIA is being phased out under the newer 0101.07 framework published in November 2023.
- Level IIIA, renamed HG2 under NIJ 0101.07, is the most protective soft armor available and stops rounds up to .44 Magnum at 1,430 ft/s while remaining concealable under a patrol shirt.
- The Patrick Leahy Bulletproof Vest Partnership program has funded more than 1.6 million vests for U.S. agencies, reimbursing up to 50 percent of vest costs (Bureau of Justice Assistance).
What Is Soft Body Armor and Who Sets the Standards?
Soft body armor is the flexible, concealable vest worn under or over a patrol shirt. The National Institute of Justice (NIJ), a research arm of the U.S. Department of Justice, publishes and enforces the performance standards every U.S. law enforcement vest must meet. The current operating standard is NIJ 0101.06, in effect since 2008. In November 2023, NIJ published its successor, NIJ Standard 0101.07, which reorganizes level names but keeps the same core approach to protecting against handgun and rifle threats. As of mid-2026, no vest manufacturer has completed 0101.07 certification. Every certified vest on the U.S. market is tested under 0101.06, and that certification remains valid for agency procurement through the end of 2027.
Soft armor panels are built from layers of high-strength fibers. The two main families are aramid fibers, like DuPont's Kevlar and Teijin's Twaron, and ultra-high-molecular-weight polyethylene (UHMWPE) fibers, like Honeywell's Spectra Shield and Avient's Dyneema. Both families meet NIJ performance requirements. The fibers work by spreading bullet energy across a wide area, forcing the round to deform rather than punch through. Rifle rounds need hard plates. Soft armor does not stop them.
Browse our duty uniforms and apparel, where you will find shirts and outer carriers designed to layer comfortably over or under a concealable vest.
What Does Level IIA Stop?
Level IIA is the lightest option in the NIJ 0101.06 lineup. Testing requires it to stop a 9mm full metal jacket (FMJ) round at 1,165 feet per second and a .40 S&W FMJ at 1,065 fps. Panels are roughly 4mm thick, and assembled vests typically weigh 2 to 3 pounds. Extremely concealable, but the test velocities sit well below what modern 9mm duty loads actually produce from a full-size pistol barrel. Law enforcement gear coordinators shifted away from IIA years ago for that very reason. NIJ is formally retiring the designation under the 0101.07 framework, and you won't see it on agency-approved procurement lists for patrol today.
What Does Level II Body Armor Stop?
Level II, called HG1 under the newer NIJ 0101.07, is the entry point for serious patrol use. Testing requires it to stop a 9mm FMJ at 1,305 fps and a .357 Magnum jacketed soft point (JSP) at 1,430 fps. At roughly 5mm thick and 3 to 4 pounds, it stays concealable and comfortable for a full 12-hour shift. Many agencies serving urban environments specify Level II as their minimum standard, and it handles the rounds most commonly encountered in the field without adding excessive bulk or heat retention in summer conditions.
Pairing a Level II vest with a quality moisture-wicking base layer reduces heat buildup and skin irritation during extended wear. That combination keeps officers cooler without sacrificing protection.
What Does Level IIIA Stop and Why Do Most Patrol Officers Choose It?
Level IIIA, the NIJ 0101.07 HG2, is the top tier for soft body armor. Under NIJ 0101.06 testing, it must stop a .357 SIG FMJ at 1,470 fps and a .44 Magnum semi-jacketed hollow point at 1,430 fps, with backface deformation (the dent into a clay backing material) capped at 44mm to limit blunt trauma injury. Panel thickness runs around 6mm, and vest weight averages 4 to 6 pounds depending on cut and size. Heavier than Level II, yes. Still concealable under most patrol shirts.
IIIA is the most widely issued soft armor level among U.S. law enforcement for good reason. Most 9mm duty loads, .40 S&W, .45 ACP, .357 SIG, and .44 Magnum all fall inside its protection envelope. It won't stop rifle rounds or specialty pistol cartridges like the FN 5.7mm, but it covers the vast majority of handgun threats officers encounter. That level of coverage in a package you can wear all day is hard to beat.
How Do the Three Soft Armor Levels Compare?
| Level (NIJ 0101.06) | New Name (NIJ 0101.07) | Highest Test Threat | Test Velocity | Typical Panel Weight |
|---|---|---|---|---|
| IIA | Retired | .40 S&W FMJ | 1,065 ft/s | 2 to 3 lbs |
| II | HG1 | .357 Magnum JSP | 1,430 ft/s | 3 to 4 lbs |
| IIIA | HG2 | .44 Magnum SJHP | 1,430 ft/s | 4 to 6 lbs |
Source: National Institute of Justice, NIJ Standard 0101.06 (U.S. Department of Justice, 2008) and NIJ Standard 0101.07 (published November 2023).
What Changed With NIJ 0101.07?
NIJ published Standard 0101.07 on November 29, 2023. The new framework replaces Roman-numeral designations with descriptive labels: HG1 for handgun protection level 1 (replacing Level II) and HG2 for handgun protection level 2 (replacing Level IIIA). Level IIA disappears entirely. Three rifle tiers, RF1 through RF3, replace old Levels III and IV. The standard also adds stricter backface signature requirements and improved testing protocols for armor sized for women officers.
The NIJ Compliance Testing Program stopped accepting new 0101.06 applications on January 5, 2024. Final 0101.06 adjudications were completed in early 2025. The 0101.06 Compliant Products List stays valid through the end of 2027, giving agencies a clear runway to transition. No 0101.07-certified products are on the market as of mid-2026. If your agency needs vests now, buy from the current 0101.06 Compliant Products List without hesitation.
Kevlar or UHMWPE: Which Soft Armor Material Is Better for Patrol?
Both aramid fibers (Kevlar, Twaron) and UHMWPE fibers (Dyneema, Spectra Shield) meet NIJ performance requirements across the soft armor levels. The main practical difference is weight. UHMWPE panels typically run roughly 30 percent lighter than aramid panels of the same threat rating, which adds up fast on a 12-hour shift. The tradeoff is price. UHMWPE vests generally cost more upfront. Aramid vests are widely available, flexible, and durable at moderate price points, which is part of why Kevlar became the default for decades.
Both materials lose ballistic performance when subjected to repeated soaking, UV exposure, or physical abuse. Follow the manufacturer's care guide, store panels flat and out of direct sunlight, and replace the vest before the warranty expiration date. Most manufacturers warrant soft armor panels for five years from the date of manufacture. That date is printed on the panel label and is not the same as the date you bought it.
How Do You Choose the Right Soft Armor Level for Daily Patrol?
Start with your agency's general orders. Many departments specify a minimum NIJ level for sworn officers, often Level II or IIIA. If yours leaves the choice to you, think through the threat environment. Dense urban patrol with a history of high-velocity pistol ammunition points toward IIIA. A lower-threat jurisdiction focused on .38 Special or 9mm FMJ may be fine with Level II. Either way, fit matters as much as rating. A panel that's too tall will dig into your thighs when seated; too short leaves your lower torso exposed. Measure your torso height and girth against the manufacturer's sizing chart. Shirt size won't get you there.
Find gear that complements your vest setup in our duty gear collection, including pouches, carriers, and accessories for a complete patrol loadout. If you're also building out a duty belt, our duty belts and accessories section has everything from inner belts to keepers and attachment hardware. And our uniforms and apparel section includes class A and class B shirts tailored with enough room to layer cleanly over a concealable vest without pulling across the chest.
Frequently Asked Questions
What is the difference between Level II and Level IIIA soft body armor?
Level II stops threats up to .357 Magnum at 1,430 ft/s and weighs 3 to 4 lbs on average. Level IIIA stops everything Level II does plus .44 Magnum at 1,430 ft/s, and it is about 1 to 2 lbs heavier and roughly 1 to 2mm thicker. IIIA covers a broader range of handgun threats on patrol. Most law enforcement agencies specify IIIA as their standard issue soft armor level for that reason.
Will Level IIIA stop a rifle round?
No. Level IIIA soft body armor stops handgun calibers only. Common rifle cartridges including 5.56 NATO and 7.62x39 will penetrate a IIIA vest. Stopping rifle fire requires a hard rifle plate rated at NIJ Level III or Level IV, worn in a plate carrier or external vest carrier on top of your soft armor system.
How long does soft body armor last before it needs to be replaced?
Most manufacturers warrant soft armor panels for 5 years from the date of manufacture, and many agencies treat that date as the replacement threshold. Heat, moisture, and repeated compression degrade the ballistic fibers over time. Check the manufacturer warranty label sewn into your vest panel for the specific date. Never wear panels beyond their expiration date even if they appear undamaged from the outside.
What is NIJ 0101.07 and should I wait for it before buying a new vest?
NIJ 0101.07 is the updated body armor standard published in November 2023. It renames Level II to HG1 and Level IIIA to HG2 and adds stricter backface deformation testing. As of mid-2026, no vest has completed 0101.07 certification. Buying a vest certified under the current 0101.06 standard is completely valid. That certification remains active for agency procurement through the end of 2027.
Does the Patrick Leahy Bulletproof Vest Partnership program help agencies buy body armor?
Yes. The Patrick Leahy Bulletproof Vest Partnership (BVP) program, administered by the Bureau of Justice Assistance, reimburses eligible state and local agencies for up to 50 percent of the cost of NIJ-certified body armor. Since 1999 the program has served more than 13,000 jurisdictions and funded the purchase of more than 1.6 million vests using over $624 million in federal funds.
Body armor is non-negotiable on patrol. Whether you're sorting out Level II versus IIIA for the first time or catching up on what the 0101.07 transition means for your next purchase cycle, the right information helps you make a choice that actually keeps you safe. Visit the uniforms and apparel section at Code 4 Uniforms to find outer carriers, uniform shirts, and apparel built to work with concealable armor systems.
This article was written by the Code 4 Uniforms Team, a group of gear specialists helping law enforcement and public safety professionals find the right equipment for every assignment.
Sources
- National Institute of Justice, "Ballistic Resistance of Body Armor NIJ Standard 0101.06," U.S. Department of Justice, 2008. Retrieved July 21, 2026 from nij.ojp.gov/topics/equipment-and-technology/body-armor.
- National Institute of Justice, "Ballistic Resistance of Body Armor NIJ Standard 0101.07," U.S. Department of Justice, published November 29, 2023. Retrieved July 21, 2026 from nij.ojp.gov/topics/equipment-and-technology/ballistic-resistance-body-armor-nij-standard-010107.
- Bureau of Justice Assistance, "Patrick Leahy Bulletproof Vest Partnership Fact Sheet," Office of Justice Programs. Retrieved July 21, 2026 from bja.ojp.gov.
- Criminal Justice Technology Testing and Evaluation Center, "NIJ Standard 0101.07 Information," cjttec.org. Retrieved July 21, 2026.
- National Law Enforcement Officers Memorial Fund, "Only 59% of Police Agencies Require Officers to Wear Body Armor," nleomf.org, citing Police Executive Research Forum data. Retrieved July 21, 2026.
- Police1.com, "How body armor saves lives: Interpreting LEOKA data," police1.com, citing FBI Law Enforcement Officers Killed and Assaulted data. Retrieved July 21, 2026.