Broad Airpro Mask blog

Michael In San Francisco A Critical "Medical" Device For People With Respiratory Problems; And Others 5.0 out of 5 stars Reviewed in the United ...

Test particulate matter before and after Airpro mask The result without Airpro mask:  PM0.3~2.5: 15221; PM 10: 21; The result with Airpro mask: PM0...

Everyone has been wearing them for quite awhile and we are no strangers to it. The mask can isolate particles and second-hand smoke in a complex ...

  From https://www.nytimes.com/, Tim Heffernan Air purifiers with HEPA filtration efficiently capture particles the size of (and far smaller than)...