3 ms·
N99/FFP3 masks usually have valves, making it them inappropriate for covid. And in the end, fit is more important than the filtration rate. The 95% rate of N95
by GuB-42 5y ago
N99/FFP3 masks usually have valves, making it them inappropriate for covid. And in the end, fit is more important than the filtration rate. The 95% rate of N95 is actually a minimum, it is likely much higher for actual virus-containing aerosols, but if air leaks from the sides, it becomes much lower.
If you think you need better than N95, you will probably want a full face mask with HEPA filters.
- nikolay 5y ago3M offers FFP3 masks without valves [0]. I found a couple more companies with disposable FFP3 masks, but none with N99 certification. I managed to buy EGE masks (made in Turkey, but certified in EU) [1] when I was in Bulgaria and they were less than $2 a piece. The other part of the math of masks is that a $2 FFP3 mask is actually cheaper than a KN95 mask, which has a shorter lifespan. [0]: https://www.3m.com/3M/en_LB/p/d/v101158114/ https://www.3m.com/3M/en_LB/p/d/v101158114/ [1]: https://www.egemaske.com/ege-700-ffp3-nr/ege-700-ffp3-nr-d.html https://www.egemaske.com/ege-700-ffp3-nr/ege-700-ffp3-nr-d.h...