Philippines

•Exceptional 99.97% filter efficiency meets NIOSH P100-series test criteria
•Plastic filter encasement designed for high heat or wet applications
••••Hazard Type: Mold, Particulate, Silica••••
•Use and reuse of P-series filters is subject only to considerations for hygiene, damage, and breathing resistance.
•All filters should be replaced whenever they are damaged, soiled, or increased breathing resistance is noticed.

3M recommendation on service time of P-series filters:
If filter becomes damaged, soiled, or breathing becomes difficult, leave the contaminated area and dispose of the filter. 

If used in environments containing ONLY OIL AEROSOLS, dispose of filter after 40 hours of use or 30 days, whichever is first.

If a filter is used in environments containing NON-OIL AEROSOLS, the filter will cake and efficiency will increase. This increase in efficiency is accompanied by an increase in breathing resistance which can help signal the wearer to change the filter. 

If the filter is used in environments that contain a MIXTURE of oil and non-oil aerosols, the P-series time use limitation reverts to dispose of the filter when it becomes damaged, soiled, or difficult to breathe through. 

Only if a P-series filter is used in an environment that contains only oil aerosols does the full time use limitation apply - 40 HOURS or 30 DAYS.