NBC-37 SOF CBRN Gas Mask Filter (40mm NATO)
The NBC-37 SOF® is built for professionals, emergency preparedness, and long-term storage. Designed around the universal 40mm NATO standard, it delivers dependable protection against chemical, biological, radiological, and nuclear threats while offering exceptional durability and one of the longest shelf lives available today.
Whether you're building a preparedness kit, equipping a response team, or replacing an aging filter, the NBC-37 SOF® offers reliable performance backed by European certification and tested CBRN protection.
Why Choose the NBC-37 SOF?
Not every emergency requires the most specialized filter available. The NBC-37 SOF® was engineered to provide comprehensive CBRN protection while remaining lightweight, durable, and easy to store for decades.
Key advantages include:
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20-Year Factory-Sealed Shelf Life – Store it once with confidence and reduce replacement costs over time.
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Universal 40mm NATO Compatibility – Fits most modern NATO-standard gas masks and PAPRs using Rd 40 × 1/7" threading.
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Impact-Resistant Housing – Rugged polymer construction helps protect the filtration media during transport and operational use.
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Professional CBRN Protection – Certified against a broad range of chemical warfare agents, toxic industrial chemicals, radioactive particles, biological threats, and hazardous particulates.
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Compact & Lightweight Design – Weighing only 265 grams, the NBC-37 reduces user fatigue during extended wear.
Comprehensive Protection Profile
The NBC-37 SOF is classified as A2B2E1SXP3 DR REACTOR. It provides elite-level defense against:
✓ Organic Gases & Vapors (A2): Protects against substances such as cyclohexane.
✓ Inorganic Gases & Vapors (B2): High-capacity defense against chlorine, hydrogen sulfide, and hydrogen cyanide.
✓ Acid Gases (E1): Effective against sulfur dioxide and other acid vapors.
✓ CBRN Agents: Tested and proven against Sarin (GB), Soman (GD), Mustard Gas (HD), Phosgene (CG), and Cyanogen Chloride (CK).
✓ Nuclear threats: Certified for protection against radioactive methyliodide (REACTOR P3).
✓ Biological & Particles (P3): Achieves a particle filter efficiency of >99.99% against solid and liquid particles, bacteria, and viruses.
✓ Tactical Threats: Blocks riot control agents (Lachrymators), including CS, CR, CN, and pepper spray (OC).
Key Technical Specifications
| Feature |
Detail |
| Standard Connection |
Rd 40x1/7" Thread (EN 148-1 / STANAG 4155) |
| Housing Material |
Impact-resistant hard plastic |
| Weight |
265 ± 3%grams
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| Dimensions |
111 mm (Diameter) x 75 mm (Height) |
| Storage Life |
20 years (factory sealed) |
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Exclusive Safety Features
✓ System Compatibility: Can be used in connection with a suitable service respirator or Powered Air Purifying Respirator (PAPR).
Storage & Maintenance
To ensure the full 20-year shelf life, store the filters unopened in their original plastic bags. Ideal storage conditions are in a clean place at temperatures between -5°C and +30°C with relative humidity below 80%. Never attempt to clean the filters with compressed air or water, as they cannot be regenerated.
