@lyncia I'd recommend 3M or 3M-compatible masks, since you can find them and their filters basically anywhere. i'm also using 3M's model 604 filter on the exhaust port of the mask for source control, to filter my exhaled air so I don't spread anything I have. Most elastomeric masks AREN'T designed for source control, so this is something to watch out for.
@lyncia There have been a few new SC masks released since the start of the pandemic, though, like the MSA Advantage 900 or the Dentec Comfort-Air. The Advantage 900 features a voicemitter diaphragm, so you aren't muffled as much when speaking. Those two masks, however, operate so you breathe in AND out through the main filters, meaning they can get really humid as moisture gets trapped inside the filters and humidifies incoming air.
@lyncia The separate filter on the exhaust port, like with the 3M, means you preserve one-way airflow, keeping moisture down. It does come at the cost of severely muffling your voice, though, as the 3M masks lack a voicemitter. My ST-S100 doesn't have this issue, despite my jury-rigged exhalation filter, thanks to its built-in voicemitter.
@lyncia Another half-mask respirator i've heard good things about is the GVS Elipse. It's pretty light and compact and has source control variants (including proper one-way airflow on the P3 filter model). The main issue is that the filters aren't readily sold most places, so you'd have to order replacements online.
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