If you’re shopping for a ballistic helmet or body armor, you’ll quickly see two codes everywhere: NIJ 0106.01 and NIJ 0101.06. They look similar, but they apply to different products and test different threats. Misreading them can lead to the wrong purchase or misleading marketing claims. This guide breaks down the differences—plus what the new NIJ 0101.07 means—so you can buy with confidence.

• NIJ 0106.01 = Helmets(ballistic helmets; penetration & backface testing). Not a current “NIJ-certified" product category; helmets are typically tested to 0106.01. 

• NIJ 0101.06 = Body armor for the torso(soft armor & hard rifle plates; Levels IIA/II/IIIA/III/IV). Was the dominant armor standard from 2008—now updated by 0101.07. 

• Scope: Test methods and minimum performance for helmet shells (face shields not included).

• Threats & Methods: Handgun rounds, pellet/shot threats in some interpretations; measures penetration and helmet shell deformation/BFD as injury risk proxies.

• Status: Published 1981; still referenced. Helmets are commonly advertised as “tested to NIJ 0106.01" rather than “NIJ certified." 

• Scope: Minimum performance for body armor protecting the torso (soft armor and hard armor rifle plates).

• Legacy Levels: IIA, II, IIIA (handgun); III, IV (rifle).

• Since 2008 it has been the market baseline; many products and tenders still reference it. 

While your title compares 0106.01 vs 0101.06, in 2024–2025 the field shifted to NIJ 0101.07, which:

• Renames levels to HG1/HG2 (handgun) and RF1/RF2 (rifle), aligning with a separate NIJ 0123.00 threat specification.

• Modernizes test rounds/protocols and improves rigor (e.g., refined rifle threats).

• Is being implemented in the NIJ CTP, with .06 listings moving to inactive during transition. 

Bottom line: 0101.06 remains widely understood, but 0101.07 is the current direction for torso armor. 0106.01 for helmets remains separate and unchanged. 

• NIJ standards: U.S. National Institute of Justice performance/test standards for police protective equipment.

• Ballistic helmet: Head protection primarily against handgun threats and fragmentation; tested under NIJ 0106.01.

• Body armor: Soft armor vests and hard armor plates that protect the torso; tested under NIJ 0101.06/0101.07.

• NIJ levels: Historical 0101.06 levels (IIA/II/IIIA = handgun; III/IV = rifle). Under 0101.07, these become HG1/HG2 (handgun) and RF1/RF2 (rifle). 

• PE (UHMWPE): Ultra-high-molecular-weight polyethylene; a lightweight ballistic fiber used in soft armor and as backing in hard plates/helmets.

• Aramid: Heat-resistant synthetic fibers (如 Kevlar®) used in soft armor and helmet composites; higher heat tolerance than PE.

• BFD (Backface Deformation): The dent made in the clay backing (or helmet shell deformation) when a bullet is stopped—too much BFD can still cause injury. 

• Look for “tested to NIJ 0106.01" with transparent lab reports (velocity, rounds, shot placement, BFD/deformation).

• Consider material: Aramid (good heat tolerance, robust) vs PE (lighter); modern helmets often blend materials to balance weight, rigidity, and multi-hit performance.

• Check fit/retention: pads, suspension, and rail/shroud mounting must withstand impact and help manage BFD. 

• For tenders that still specify 0101.06, match IIA/II/IIIA/III/IV.

• For forward-looking agencies, confirm 0101.07 compliance (HG1/HG2/RF1/RF2) and request the NIJ CTP listing. 

Q1: Can helmets be “NIJ certified"?A: No. Helmets are tested to NIJ 0106.01, but NIJ’s current CTP compliance listings are for body armor, not helmets. Beware of “NIJ-certified helmet" claims. 

Q2: Is NIJ 0101.06 obsolete now that 0101.07 exists?A: Not instantly. Many products/tenders still cite 0101.06, but NIJ and labs are implementing 0101.07; .06 listings are being moved inactive as part of the transition. 

Q3: What do HG1/HG2 and RF1/RF2 mean?A: They’re the 0101.07 categories for handgun (HG) and rifle (RF) threats, defined against a common 0123.00 threat catalog to make comparisons clearer. 

Q4: Do helmet levels (0106.01) equal vest levels (0101.06)?A: No—different standards, different methods. A “IIIA helmet" claim usually means it stopped a IIIA-type handgun round in lab testing, not that 0106.01 uses the vest level names. Always read the test report. 

NIJ 0106.01 (helmets) and NIJ 0101.06 (torso armor) are not interchangeable. 0106.01 remains the reference for ballistic helmets, while torso armor is moving from 0101.06 to the newer 0101.07 with clearer HG/RF levels and an updated threat catalog (0123.00). For procurement and end-users, match the right standard to the right product, request transparent test data, and—where applicable—verify NIJ CTP compliance for body armor.