An N100
(http://www.staples.com/office/supplies/StaplesProductDisplay?storeId=10001&catalogIdentifier=2&partNumber=422425&langid=-1&cid=PS:GooglePLAs:422425&srccode=cii_17588969&cpncode=33-265475753-2)
or similar mask should be effective enough for most normal applications and
won't be particula
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There is an article on the web, suggesting that dust mask are ineffective
at preventing the wearer ( caver ) from breathing in dust particles.
http://news.discovery.com/human/health/face-masks-provide-false-hope-against-pollution-140228.htm
