NIJ Protection Levels: IIA, II, IIIA, III and IV

The armor protection level classification developed by the National Institute of Justice (NIJ) is as follows: IIA, II, IIIA, III, and IV . The “A” designation in some levels indicates that the vest provides more protection than the previous level but does not meet the standard of the next level, therefore it is usually a half-step up. However, despite being an armor level, this classification is now outdated and is no longer endorsed by the NIJ due to its low level of resistance.

Soft body armor is typically level IIIA and below, while hard body armor and ballistic protection equipment is typically level III and above, including body armor plates. Each of these five armor levels has distinct advantages against different types of ammunition. Namely,

• Level NIJ IIA is a minimum standard for bulletproof vests. It is the standard applied in the production of soft body armor, which is usually composed of layers of high-strength fibers. Examples of these fibers include para-aramid and high-performance polyethylene. Compared to Level NIJ II, NIJ IIA rated vests are lightweight and flexible. Because they can be easily concealed under clothing, NIJ IIA vests are well suited for everyday civilian and law enforcement use. However, NIJ levels IIA and IIIA do not provide any protection against rifle ammunition, only some handgun rounds. Using this armor person is protected against 9mm and .40 Smith & Wesson rounds.
• Level NIJ II body armor is also referred to as soft armor. It offers greater force protection than Level IIA and can resist a wider variety of ammunition types. NIJ II is heavier than NIJ IIA, but is still relatively lightweight and flexible overall; therefore, NIJ II is increasingly replacing NIJ IIA when it comes to the production of concealable vests. This armor is designed to protect the wearer from 9mm and .357 magnum ammunition from short-barreled handguns.
• Level NIJ IIIA is the most common level of soft body armor protection. It protects against nearly all common handgun rounds. NIJ IIIA body armor is significantly heavier than NIJ IIA and NIJ II rated products. This level is soft for easy flexibility, but provides excellent protection against .357 SIG and .44 Magnum ammunition from longer barreled handguns.
• Level NIJ III is the most common type of body armor. It is the beginning of the standard level for rifle bullet protection and stops all pistol caliber bullets. Consisting mostly of hard armor plate inserts, NIJ III provides protection against all low-level body armor threats. Body armor in this category can be bulky or lightweight depending on the material used. This hard body armor uses metal plates or other composite materials to resist rifle bullets. This armor is tested to withstand 7.62mm FMJ lead-cored rifle ammunition.
• Level NIJ IV is the highest level of protection that can resist armor-piercing rifle rounds. Body armor in this category is the heaviest on the market and therefore not as comfortable to wear as lower-rated products. It is also more expensive than NIJ levels IIA, II, IIIA, and III. This level is the strongest body armor on the market. It is specifically designed for military applications and can withstand armor-piercing rifle ammunition with a .30 cal steel core.

In addition to the NIJ ballistic ratings for bulletproof armor, there are several other standards published by the U.S. State Department. Several countries and independent testing organizations have also produced their own standards.

Products rated to NIJ protection levels have significant advantages in the field. They are battle-proven, high-quality products manufactured for the intended application and the level of protection they provide.

Independent testing of body armor (bulletproof clothing and bulletproof materials) is performed in advanced laboratories to ensure that ballistic products sold on the market can stop bullets as promised. These tests are important because the result of these tests is a body armor rating system that allows consumers to reliably compare and contrast products across brands.

These tests are performed to ensure that products made of bulletproof material and sold as body armor meet the highest standards.

The five levels of ballistic protection mentioned above are described in the standard “NIJ 0101.06 Ballistic Resistance of Body Armor” developed by the National Institute of Justice (NIJ). These levels are categorized by threat. Which ballistic products meet which levels of protection depends on the type and velocity of the projectile they can resist. Level IIA, Level II, Level IIIA, Level III, and Level IV, body armor performance standards help users better understand how much protection they can expect from the body armor they choose to wear.

Our organization has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. Among the numerous test, measurement, analysis and evaluation studies provided for businesses in various sectors, there are also NIJ protection levels: IIA, II, IIIA, III and IV testing services.