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In response to shortages in NIOSH-approved PPE during the COVID-19 crisis, DEI developed a custom filter insert adaptor that can be used to convert a standard snorkel mask into a reusable, full face respirator that effectively protects the eyes, nose and mouth from airborne particles. While experimental in nature, these masks provide effective protection for healthcare workers and first responders who lack access to N95 respirators and approved filter cartridges.

These converted masks and custom adaptors are reusable and utilize consumable filter inserts that can be replaced as needed. The filter insert material is conventionally used as a fabric/netting to contain blown insulation, but is effective in capturing >99% of airborne particulate of interest and most importantly, this material is readily available and can be used to quickly produce large quantities of consumable filter inserts now. DEI has conducted confirmatory testing to demonstrate that these converted masks passed a standard mask fit test and, along with the selected filter insert material, provide a level of protection equivalent to or exceeding that of an N95 respirator when worn properly.