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3-pack of Vassalli non-medical PM2.5 filtered masks with 3 filters per mask – 9 filters in a 3 pack of masks.
PM2.5 is an ISO standard referring to tiny airborne particulate matter that are the less than 2.5 microns (0.0025mm) wide – or 3% the size of human hair. A PM2.5 filter is designed to filter airborne particulate matter smaller than 2.5 microns. ISO describes the efficiency of such filters to be capable of filtering particle sizes in the range of 0.3 microns to 2.5 microns.
** Please be advised that our non-medical masks are not replacements for medical grade personal protective equipment and do not guarantee full protection against COVID-19. We recommend you practice the safety guidelines mandated by your government and your healthcare professionals **
** Please note: For hygiene reasons this product cannot be returned **