The filtration for most melt brown mask will be decrease from time to time, that people not able to know what is the protective of the mask they are wearing, :dc mask use nano membrane as filter, the filtration rate would not be decreased after use, people always got enough protection. :dc mask not only provide medical mask protection, but also protect you from aerosol particle, its a N95 grade total solution mask, and provide you both high efficiency filtration and breathy comfort.

Melt brown mask is disposable, that also crease lot trash and become a big issue for the environment. :dc mask is washable and re usable, wear can even sprayed with 75-95% alcohol for disinfection, and wash by clean water, which greatly reduces garbage pollution.