Made in Canada by Canada Strong Masks using top-quality Filti filter material imported from the USA.
This filter insert fits any washable reusable cloth face mask with filter pocket. Its 3.25 x 4.75" size is identical to a standard PM 2.5. For child's size, the material trims easily with scissors.
Filti's next-generation 3-layer construction uses nonwoven spunbond polypropylene plus patented lightweight ePTFE nanofiber technology in the middle layer. This allows Filti to have excellent filtration and easier breathability than activated carbon PM2.5 filters and HEPA filters.
Filti is designed to filter small sub-micron particles and its performance far exceeds cotton and cotton blends. Filti material has typical 99% PFE (ASTM F2299) and typical 98% BFE (ASTM F2100-19). In contrast, competitor PM2.5's are designed to filter larger 2.5 micron particles found in city air pollution.
Reduce transmission with better filtration technology by Filti.
- place insert into cloth mask pocket so that deeper bond points and fluffy/lofty texture face outwards, and the side with less loft and shallower bond points faces inwards
- between wearings, leave filter in-mask exposed to room air so it can dry
- after 8 hours of accumulated wearing, dispose of filter and wash mask
- NOTE: these are for washable cloth masks and are not intended for use with FN-N95-508 disposable masks
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