The Respokare mask is the first active protection mask with the capability to neutralize hazardous oxidizing gases in air pollution. Filters 98 percent of PM 2.5 Particulates. The active respo layer neutralizes 90 percent nitrogen dioxide (NO2) and other toxic gases including sulfur dioxide (SO2). Unique design of NO2 indicator system allows easy identification of the level of NO2 in air pollution and also a mean to indicate the longevity of the mask when contacting air pollutants.
The last one on our list comes in two sizes, regular for adults, and small for children. It is advertised as a mask that blocks 98.5% of PM2.5 particulates. It has an active respo layer as well, that neutralizes ≥ 90% of nitrogen dioxide, as well as other toxic gases. It is not washable, however, and it lasts between 40 and 60 days depending on your usage rate. There is an indicator that changes colors when the mask is useless.