3D-Knit Mask with Replaceable Filter
$3.99
This knit filter mask comes with eight filters which can be replaced between washes or as needed. The filter material has been tested using a NaCl challenge aerosol with 0.3 micron particle size, and is rated as BFE 98. It is made from spun-bonded 25 gsm poly-propylene and is custom fitted to the mask.
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