Cup shaped mask with respiratory valve

Cup shaped mask with respiratory valve

1. Reach EU EN 149:2001 FFP3 standard.

2.  The working principle of the breathing valve is that the positive  pressure of the gas discharged during exhalation blows off the valve  plate to quickly remove the waste gas inside the body and reduce the  muggy feeling when using the mask, while the negative pressure when  inhaling will automatically close the valve to avoid the pollutants  inhaling from the external environment.

3.The  design of respiratory valve can reduce heat accumulation, make  breathing easier, suitable for high temperature, high humidity, muggy  environment for a long time to use.