1. Comply with standard GA209-1999 2. Poison gas and smoke protecting 3. Guaranteed by PICC 4. More easy to spot ... on the mask.(2) Protective time: ≥60min., Poison gas and smoke protecting, fire proof, good sealing property, suitable for all kinds ... of adult faces.(3) Object of protection: CO, HCN, poison smoke and fog, etc. This respirator contains special drug composition which ...