NIJ Level II vs Level IIIA — Which Do You Need?

NIJ Level II and Level IIIA are both soft armor handgun protection levels — the difference is the threat each is tested to defeat. Level II is tested against 9mm FMJ and .357 Magnum at standard velocities. It is thinner and lighter than IIIA, making it the choice for officers who prioritize concealability and extended wear comfort in environments where the threat profile justifies the lower protection level.

Level IIIA is tested against .357 SIG FMJ and .44 Magnum SJHP — a significantly harder threat set. As a result, IIIA is the standard recommendation for most patrol officers, uniformed security professionals, and anyone operating in an environment where higher-velocity handgun threats are possible. The tradeoff is slightly more weight and thickness compared to Level II.

For the soft armor comparison table, both levels are included. Specifically, you can filter by threat level to see only Level II or only IIIA options side by side within each protection category.

Understanding Areal Density

Areal density is the weight of the armor panel per square foot, expressed in lbs/ft². It is a more accurate comparison metric than total panel weight because it accounts for variation in panel size across manufacturers and size designations. Consequently, comparing areal density tells you which panel is genuinely lighter at equivalent coverage — not just which has a smaller overall footprint.

In this soft armor comparison, areal density ranges from approximately 0.58 lbs/ft² for the lightest Level II options to 0.95 lbs/ft² for the heaviest IIIA panels. As a result, the lightest Level II panel weighs roughly 40% less per square foot than the heaviest IIIA option — a meaningful difference for officers wearing armor all day.

Understanding Thinness

Thinness — measured in inches — is the primary concealability metric for soft armor. Thinner panels print less under clothing and are more comfortable against the body during extended wear. Furthermore, thinner panels are generally more flexible, conforming better to body movement during active duty.

In this soft armor comparison, panel thinness ranges from 0.153 inches for the Armor Express Razor XT Level II to 0.24 inches for some IIIA panels. To put this in perspective, the difference between 0.153″ and 0.24″ is less than 2mm — but that difference is perceptible under a fitted dress shirt, which matters significantly for plainclothes and executive protection roles.

Special Threat Testing

Special threat testing evaluates soft armor against rounds not included in the standard NIJ test protocol — such as 9mm +P+, .357 SIG GDHP, 5.7×28mm, 7.62×25mm Tokarev, and .40 S&W. Testing is conducted at an independent NIJ-certified laboratory under the same conditions as standard NIJ testing. As a result, armor that passes special threat testing provides verified protection against these rounds beyond the base NIJ certification.

Most Armor Express and GH Armor products in this soft armor comparison carry special threat certification. BulletSafe products are NIJ-certified at the base level. For agencies operating in environments where 9mm +P+ or 5.7×28mm threats are encountered, special threat testing is a meaningful differentiator worth filtering on in the table below.

Neutral vs. Female Cut Panels

Neutral cut panels are flat and rectangular — the standard panel shape designed for male torso geometry. Female panels come in two types: non-structured (female-sized template, flat construction) and structured (shaped to conform to female body contours). Specifically, structured female panels provide better coverage at the panel edges and more consistent daily comfort for female officers. Furthermore, NIJ 0101.07 adds angled shot testing specifically for non-planar female panels, making the structured vs. non-structured distinction increasingly important for agencies procuring to the new standard.