FFP3 and N95 masks will stop micro and nano plastics but the issue is its polypropylene, so the question becomes how much it sheds verses how much it blocks. Most of the PM2.5/10 tests against these masks shows they are better than outside air but I don't think the exact composition is fully understood. Based on how its sort blown molten fibres I suspect it sheds quite large bits of plastic if it does.

> ideally would prefer something like reverse osmosis but not so practical

Just curious why that is? I was going to buy one for my new house and they seem pretty practical, at least for drinking water at home.

I live in a small place that I rent so I don't have so much space for the system, but if you have the space for it I would say it's worth it! I would also love to have RO for my shower but I haven't found a solution for that.

The RO filtration membrane is also made of plastic. I haven’t found a way to avoid microplastics even though I have my own well and have an RO system.

You're correct, your RO system should reduce the amount of microplastics significantly though, to a point that makes your water much safer than most common options.

Maybe? You’re literally forcing water under high pressure across a plastic membrane, to me it feels like that would add a tremendous amount of microplastics to the water. I don’t know what the answer is though since I can’t seem to find any real studies around this.