Yihu A-9 double tank half mask

the main body that contacts the face is greatly changed;
it is suitable for medium and large face type people to wear, with double filter boxes to increase the anti-virus time and make the air smooth;
the filter box extends backward to change the center of gravity of the mask and make it more comfortable to wear;
the silicone bracket has good resistance to high temperature and low temperature, and is suitable for long-term use.
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