@Cahatstrophe The only reusable models that provide N95 comparable or better filtration, and substantively reduce waste, are the cartridge-based elastomerics like painters and tradespeople wear.

Models like the FloMask and Envo Mask use filter inserts which are basically an N95 without straps. If they're a good fit and more comfortable, they can be great options, but their filters need to be replaced just as often as disposable N95s.

I do not aim to discourage their use; I'm just clarifying.

@Cahatstrophe The replacements for flat-filter elastomerics like FloMask and Envo Mask also tend to be the same price or more expensive than many great N95 models.

If it fits you, the 3M Aura 1870  is actually a great way to reduce waste and is one of the best N95s on the market:
https://amazon.com/dp/B0937JGMY7

These are regularly offloaded by hospital systems and medical suppliers at a deep discount when they turn over warehouse stock during the last year of their manufacturer guarantee.

@Cahatstrophe These can't be used in medical settings after the guarantee date for liability reasons, but they've been independently tested to perform like new even when they're 5-10 years past their guarantee.

The thing that can degrade in that time is the straps which can become a bit more likely to break when donning. But that's 5 years after the printed date, and these get sold on Amazon in the months before said date. So, they have lots of time before that starts to be a consideration.

@Cahatstrophe Using these respirators which will otherwise be thrown in the trash once they get beyond their guarantee date is a great way to reduce waste while getting a phenomenal deal - around 12 cents per N95.

All that said, whichever model of disposable fits you best and works well for you is still a great thing to stick with. Unless you switch to a cartridge-based elastomeric, there's very little change to the waste produced, but there's likely to be an increase in the overall cost.

@Cahatstrophe PS: if you do want to consider a cartridge elastomeric, I quite like the 3M 7500 series. It uses the most comfortable and conforming silicone of any of their models, and it's compatible with a huge range of 3M filters, both cartridge and pancake style.

Apart from clear weight/size differences from an N95, the two main potential downsides or considerations are:
1) It's harder for people to hear what you're saying than through an N95.
2) The exhalation valve means no source control.

@Cahatstrophe PPS: I maintain the Masking Reference Doc at
https://texanalysis.com

In it, you can find specific studies and guidance regarding respirator reuse, total wear time, and the way the degradation of the electrostatic charge necessitates replacement well before there are any visible signs of the respirator wearing out.

(Also info on: safe mask decorations, facial hair accommodations, drinking valves, a size-sorted list of community-tested respirators, and lots more.)