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Amazon.com has Winner Medical Face Mask 50 pcs/Box for $7.99 (Orig $17.29)
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3 layer construction, top and liner layers are PP non-woven, middle layer is high.Meet the standard: ASTM F2100-19 Level 1. PFE (filtration efficiency for non-oily particles) & BFE (bacterial filtration efficiency) ≥95%.
