Product must meet all of the following requirements
1. Must protect against CS, CN, and OC gases
2. Must be compatible with anti-riot helmets
3. Must have a single wide visor (not dual lenses), made from polycarbonate or polyurethane
4. Must have two 40mm NATO or STANAG filter ports
5. Inhalation resistance must be less than or equal to 2.5 mbar at 160 liters per minute
6. Exhalation resistance must be less than or equal to 3.0 mbar at 160 liters per minute
7. Canister must have a humidity indicator
8. Gas mask, canister, and pouch must all be black with a matte surface
9. Pouch must include belt or leg strap and a compartment for an extra filter
10. Must have a shelf life of at least 5 years and a warranty of 12 months
11. Must comply with one or more of the following standards: NIOSH, SIRIM, STRIDE, BS EN 136: 1998, or equivalent