Made in USA.
Particulate Filtration Efficiency
99.25% with NIOSH-specified 0.26 MMD particulates
Viral Filtration Efficiency
99.997% per ASTM-F2101.
Bacterial Filtration Efficiency
99.999% per ASTM-F2101.
Up to 8 hours
Made in USA
Nelson Labs performed all viral and bacterial filtration efficiency testing. Additional testing by manufacturer.
ASTM-F2101 and FDA Good Manufacturing Practices (GMP) regulations.
Dispose if resistance increases or soiled
15 pack: 60mm / 12g (2.36" / 0.4 oz)