On: Ask HN: How are you preparing for COVID-19 disruptions?

[cactus2093]

I assumed the reason not to re-use them is that the paper mask structurally wears out and no longer creates the proper seal on your face.

[veemjeem → cactus2093]

what about the P100 filter cartridges used on half/full face respirators? Those have a plastic skeleton with a rubber gasket.

[kps → veemjeem]

They last indefintely, i.e. change the filter when it becomes clogged, which will be approximately never if you're not actually using it in a dusty environment. But check the manufacturer's instructions.