What should you pay attention to when choosing?

1. Be wary of fakes when purchasing through channels you cant fully trust. Wear the right mask, if it hasnt been dirty for a long time, it must be fake.

2. As long as it is genuine, at present, any serious warning on the packaging that "improper use will cause disease or death" is effective.

3. A mask of a few hundred yuan has its meaning, but it may not be more "effective" than a mask of a few yuan.

What should I pay attention to when wearing?

1. Use both hands to press the metal strip on the mask into an arc that fits your face and nose, instead of "pinching" with one hand.

2. Unless you can read the full text yourself, dont give the masks mentioned in the text to those who need special care.

3. Try not to wear a mask exercise, especially do not wear ordinary, no exhalation valve mask exercise.

4. For all haze dust protection masks, the "filtration" organization cannot be reused by washing.