China Reusable Nano-PTFE Mask BFE99
China BEF 99% New Generation Nano PTFE Reusable Face Mask Air Filter Material Replace MeltBlown NonWoven Fabric Manufacturer For N99-N95 Masks & Non Disposable Face Mask.PFE ≥95%, BFE≥99% High Efficiency PTFE Membrane Filter. Reusable Face Mask 20-50GSM Expanded PTFE Membrane Mask Can Washable, Also 15-20 Days Wear Mask. ePTFE Mask is Low Cost & High Usage New Material
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