These face mask filters are tested in the USA by Nelson Labs, an FDA-registered, leader in laboratory testing.  These replacement filters can be purchased in 10 and 30 packs.  

• SIZES:  Kids, Small/Medium, Medium/Large.  Filters are to be used with >99% face masks.  Purchase filter replacements that match the size of the >99% face mask you need replacements for.  

• FILTERS: These face mask replacement filters are laboratory-tested in the USA for your protection. For best use, it is recommended to change and dispose the filter daily.

• HOW TO USE: To change the filter, turn the mask over and slide the used filter out. The filter ends will slightly stick out of both sides when in place

• MATERIAL: The filter is made of melt-blown polypropylene ultrasonically bonded to a layer of charged, spun-bound polypropylene.  All face mask filters are made in the USA.