There's literally no evidence that they shed nano-plastic particles in regular use. Also they need to be disposable to be useful, they're filters which trap thi

There's literally no evidence that they shed nano-plastic particles in regular use. Also they need to be disposable to be useful, they're filters which trap things you don't want in your lungs. Also, if you put them into the regular trash, they just go to a land fill, which is totally fine.