face mask with valve makes breathe Well this could be used in Construction, mining, textile, grinding, pharmaceuticals, cement  Dust mask Description ,* exhalation valve design, reduce the quantity of heat accumulation, make breathing more easily, suitable for high...

face mask with valve makes breathe Well this could be used in Construction, mining, textile, grinding, pharmaceuticals, cement  Dust mask Description ,* N95 filtering material, can screen dust effectively*Adjustable nose clip, make the mask and facial impermeability better,...

face mask with valve makes breathe Well this could be used in Construction, mining, textile, grinding, pharmaceuticals, cement  The inner layer is made of filter materials meeting American standard N95 to filter dust invisible to naked eyes.·High polymer point...