Electrospun Nanofiber Filter in the middle layer Only mask in India tested to filter down to 0.1 micron with a >99.7% efficacy Tested by Nelson Labs, USA Comfortable – tested with the lowest breathing resistance in...
Electrospun Nanofiber Filter in the middle layer Only mask in India tested to filter down to 0.1 micron with a >99.7% efficacy Tested by Nelson Labs, USA Comfortable – tested with the lowest breathing resistance in...
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