Awwww, what a good birdie. A bit too big to sit in his lap, but still an excellent choice for his first alien animal to pet.
"Here, just a moment, I'll get some examples to show you."
He pops back into the house and gets his Rekkan respirator and one of the spare masks from his bag.
"So, this is a pretty ordinary day-to-day mask," he says, holding up the latter. "They're not all pastel blue like this: there's lots of colours and patterns.
It's made of melt-blown fabric rated to filter to about 99.5 parts in a hundred: that's about where the tradeoff curve falls for a basic melt-blown mask, it's not substantially harder to make a 99.5 filter than it is to make, like, 90. And here's the ring of silicone around the outer edge to help it seal to your face, and these straps go around the back of your head.
It's pretty comfy--although not quite as comfy as what I'm wearing now, admittedly--and it's relatively simple to manufacture once you have the tech level for melt-blown, plus it lets your voice through very well without having to do anything special to it. The main downsides are that it isn't very durable, and in particular it can't handle getting wet. Some people don't bother with these disposables and just get something more durable for day-to-day use, but there's something to be said for not having lost much if you damage or soil it, and for being able to give a spare mask to someone else without it being a big deal. And some people like to switch up what colours they wear for different outfits and occasions, which is easier with cheaper masks."
He holds up the respirator. "This one is part of my hospital uniform, though you'll often see similar respirators outside of hospitals too. It's got a slightly more complicated head-strap system to support the additional weight.
The filters attach to the base unit here. These filters are a bit higher-grade than the ordinary masks, missing more like three parts in ten-thousand, and these specific ones are also designed to filter out smells: there are some situations where scent can be a useful indicator, but in a lot of situations it's more of a distraction than anything else. Plus it makes it very obvious whether your respirator has sprung a leak: if you can't smell anything, you know you're good.
Inside the faceplate here, there would normally be a glasses mount--I'm a bit nearsighted--but right now I've stuck my glasses mount into the respirator I'm actually wearing instead. You can also get a custom-made faceplate with a built-in corrective lens, but it's more expensive, and you won't be able to, like, let a family member borrow your respirator if theirs has broken, and it's more of a pain to replace if your vision changes and you need a new lens...and, uh, as we're seeing here, it potentially means not having a glasses mount on hand to stick in a respirator you borrow. I'd been thinking about maybe getting a custom one anyway, but I hadn't decided yet, and it sure does seem to have worked out for the best that my respirator's corrective lenses were more portable.
Over here--" indicating a sort of cartridge on the chin "--is where it catches breath condensation: you don't want that building up in the main mouth area. There's an antimicrobial lining on the inside, to discourage anything growing in there in case you don't get a chance to clean it quickly enough.
And this--" a circle on the front of the mouth area "--is the speech diaphragm, which makes your voice less muffled. Older or low-end models don't have these, but they're standard in hospitals these days because they give you more options for communication: like, you don't want to have to sign to someone while you're doing surgery, you know? Not that I'm a surgeon, but still, sometimes you have your hands full or your back turned.
Some models have induction ports that let you stick a straw in to drink, but not this one. I normally just go outside for water breaks when I'm at the hospital."
"And as for appreciating a good respirator, like...one time, we had a patient who had come in because of a growth in his mouth, so he spent a lot of time maskless while we were investigating, and we figured out hours later that he was also coming down with influenza† of all things. Apparently he'd recently been on a trip to Mentath††, and they're struggling with animal reservoirs. Anyway, uh, that could have been a disaster, but everyone around him was wearing a respirator and nobody contracted it.
Even when stuff like that doesn't happen, it's a comfort to know that you'll be protected if it does."
---
†He thinks the SLL word he's using actually means something more like "influenza-like illness", but it'll do for the time being.
††Oh hey, the additional phonemes from the sourceless-semantic-bleedover mean he can actually pronounce this now! No need to approximate with "Mentaf"!