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The three-dimensional protective mask adopts a three-dimensional structure design that matches the shape of the face, so that the gap between the mask and the sides such as the nose, cheeks and chin can be eliminated, which is impossible for ordinary masks.
The testing standard EU EN149:2001 is to filter through oily test particulate matter, FFP2 oily filtration is greater than 95%, FFP3 oily filtration is greater than 98%, and the resistance is in the range of 120-140pa.