I feel confident knowing the filters are protecting me. I replace them after several hours of repeated exposures or at least 1x a week depending on my situation.
I was skeptical at first given the current times that I would even get these masks with in a month but the processing and delivery was with in a week! The masks are comfortable and I feel more confident wearing them then most other masks. I especially appreciate the replacement filter packs!
Activated Carbon Filters PM2.5 - 5 layers - 10 pcs