I like the Drager 3500
The R-PUR Nano® mask is the most effective solution in the world at the moment. With its 5 filter layers, it filters out gases, odors, pollen, bacteria, viruses, fine/very fine particles, diesel particles and toxic particulate matter (PM) linked to air pollution.
This looks like the Gerson
SAFETY WORKS Toxic Dust Respirator
SWX00319
FEATURES
Flexible facepiece material provides an excellent face-to-respirator seal which improves fit and comfort.
Long-life cartridges are approved to the NIOSH P100 Class, so they are at least 99.97% efficient against oil- and non-oil based contaminants, and are oil-proof so they have no time use limitation.
Included P100 low-profile cartridges feature rear-entry air flow that helps keep debris out of filter and makes fit checking easier.
Honeywell North® RU8500 Half Mask
The RU8500 is one of the only reusable half masks on the market with a speech diaphragm. This feature offers improved speech clarity – eliminating the need for workers to leave the workspace or doff the mask in order to communicate.
https://twitter.com/ToshiAkima/status/1487446404851445760
Dr Satoshi Akima FRACP 『秋間聰』@ToshiAkima
Dräger X-plore 2100 Elastomeric Respirator Half Mask with P100 Filter. Comfortable with exceptional vocal clarity. Quick to don and doff. The Peppa Pig look may be polarising but if you can get over that it's a winner
Think this is Canadian, so it likely won't ship to USA (would have to use a freight forwarder)
In 2021 rights were transfered to https://mi-integration.com/en/shop/the-revolutionary-dorma-industrial/
The Dorma 99 stands out with its unique design, prioritizing comfort, breathability and facial seal. The flexible seal allows it to fit most faces, with average fit test scores of 500+. Its built-in filter offers at least 99% filtration efficiency, in contrast to standard N95 masks with 95% filtration.
The only transparent mask that protects you and others with 99.997% filtration.
New Honeywell for health care. Filtered exhaust and speech diaphram