Respirator

From KayakWiki

Personal protection equipment device to filter particulate matter or hazardous fumes from the airway.

Recommended for all power sawing, sanding, grinding, epoxying, and varnishing operations. Especially critical when sanding or grinding epoxy--even more critical for graphite!!

If you have a beard or stubble, a respirator will leak too much to be useful. For those that want to keep their beard's, a positively ventilated (i.e. powered) full face/head covering respirator is required. These are expensive.