Disposable respiratory protection
*The Assigned Protection Factor, might be different according local regulations.
Reusable respiratory protection
Advice: Change the filter after each use, or quicker if the atmosphere is polluted, humid and the air flow (or breathing) is high..
User guide for breathing apparatus filter for polluting substances
Each toxic substance has an occupational concentration limit, beyond which respiratory protection is essential. These values can be expressed in ppm (parts per million) or mg/m3.