1. Suitable for working environment where ammonia and organic derivatives of ammonia are present.

2. The mask can be closely combined with the face, and the fixing system can be adjusted as needed.

3. The mask material is made of high-grade silicone, non-toxic, odorless, non-irritating to the skin, and has excellent skin-friendly.

4. Inhalation resistance of mask: ≤15Pa;

5. Mask leakage rate: ≤1.3%

6. Mask exhalation valve resistance: ≤35Pa;

7. Ventilation resistance of the filter: when the test flow rate is (15 ± 0.6) L / min≤29Pa, the test flow rate is (47.5 ± 4) L / min≤94Pa