1. Face screen material: polycarbonate

2. Oral and nasal mask material: food grade silicone

3. Face mask material: medical grade silicone

4. Mask breathing valve: When the breathing valve is depressurized to -1180Pa, the negative pressure value of the full face mask breathing valve drops by ≤ 500Pa within 45 seconds

5. Full face hood leakage rate: The leakage rate of the full face hood is 0.02%.

6. Face mask inhalation resistance: ≤ 40Pa, mask exhalation valve resistance: ≤ 100Pa.

7. Full coverage field of view: Total field of view ≥ 70%   Bilateral visual field ≥ 55%                      

                         Lower field of view ≥ 35 º  Oil mist transmittance ≤ 0.005

8. Mask leakage coefficient ≤ 0.005%

9. Combination strength between mask and filter: 250N without significant damage

10. Inspection basis: GB2890-2009 "Respiratory Protection Self priming Filter Gas Mask"

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