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Comment by Stephen304 | Hacker News Reader

How did you retrofit the exhalation filter? I have a similar 3M mask (6000 series) but haven't used it since March since the exhale port doesn't make it easy to attach a filter. Being able to use it would solve my glasses fogging, which I've only been able to mitigate somewhat with shaped 3D printed pieces of plastic in the nose-wire slot of my fabric mask.

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I appreciate the thought and effort you and like minded are spending on this, and it hurts my soul to see the disasteraus mass Thanksgiving shopping crowds, that then showed up again in even greater numbers for Christmas in busy shopping centers.

Yup. Really can’t get my head around the ostrich-lemming like attitude of the multitudes.

By cutting some N95/best available filter fabric and fitting internally over the exhalation valve. When flying I’ve worn a Korean nanofiber mask over the top for added social protection from ignorant flight attendants and airport staff who otherwise might ask me to remove it because they can’t see the internal exhalation valve filter. Korean commercially available masks are great by the way and there’s no shortage over there.

In situations where a respirator isn’t viable or necessary a some masking tape over the nose bridge wire area is quite good for reducing or eliminating glasses fogging and providing a better seal.

Cut up surgical mask and duct tape it around the exterior vent.

Also good and perhaps better than fitting internally because others can see it.

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