The standard of protective masks does not require sealing for packaging.

The mask breathing valve is suitable for a relatively hot environment. It will be more breathable when exhaling, and the inhalation breathing valve will automatically close, which will not affect the use effect at all. Large amount.

Yes, the certification standards for different protection levels of masks are different. N95 is the US detection standard, KN90 and KN95 are Chinese protection standards, and FFP2 and FFP3 are European protection standards. FFP2 = N95 = KN95 gt; KN90, the higher the protection level, the better the filtering effect, but it can be protected against PM2.5.

KN95 level is one of the levels specified in the Chinese standard GB2626-2006, and N95 is one of the levels specified in the American standard 42 CFR 84. The technical requirements and test methods of these two levels are basically the same, but they belong to the standards of different countries.

None of the protective masks can completely protect second-hand smoke. Choose CM Chaomei's high-efficiency anti-particulate mask with activated carbon, which can indeed filter out most of the particulate matter, but because the amount of activated carbon is very limited, the particulate matter filtered onto the mask is again Persistent volatilization of odors can still be odorous for a person with a sufficiently sensitive sense of smell, and it is possible to doubt the protective effect of the protective mask. The most effective way to reduce the exposure of second-hand smoke is through ventilation.

The protective mask itself is to protect against harmful substances. If it is not tight, it will leak, and the effect will not be achieved. Therefore, if it is too tight, it will be uncomfortable. ), Or choose another style of mask.

The protective masks are made of non-woven fabric, which is tasteless. The taste of the masks is caused by the model inkjet and rubber bands, but they are all produced with high-quality raw materials and will not have any impact on human health .

Masks are reusable. Depending on the environment, if they are dirty, they must be replaced promptly. When used for the protection of non-oily particulate matter, the cumulative use time does not exceed 40 hours, or the cumulative use time reaches 30 days from the beginning, whichever comes earlier.

The difference between anti-particulate masks includes three aspects: one is the difference in protection level; the second is the difference in wearing method (such as headband, ear strap, etc.); the third is the difference in style (if foldable, one forming).