Our multi-layer and carbon filter masks offer bacteria and particle filtration efficiency of up to 99-percent, capable of removing particles down to 0.1 microns in size to ensure high protection levels. A KN95 face mask is create like an N95 mask and filters out 95% of aerosol products. face mask Certification for KN95 masks takes… Continue reading Standard Adult Disposable Masks Blue Surgical-Style 50 pk : ID 4586 : $39 95 : Adafruit Industries, Unique & fun DIY electronics and kits