5 concentration in the air is too high, which may cause harm to people's bodies, so people generally choose to wear this type..　　　　Note: This type of mask is not suitable for people who have poor breathability. Healthy people do not need to wear anti-PM2.Experts say that the human body has a certain KN90 Respirator Company resistance, and the short-term PM2.　　　　People with heart or respiratory problems (such as asthma and emphysema), pregnant women, dizziness after wearing, difficulty breathing and skin sensitivity.5 environment will not cause serious damage to health. But when the general smog comes in, the PM2.5 masks when traveling daily

can effectively absorb harmful gases such as benzene and formaldehyde in the air, and can be worn after home decoration. In most cases it can only act as a shield. It can help breathable particles in the air and can effectively prevent H1N1 influenza virus. Can help to block inhalable particles in the air.5? Reusable, easy to wash, and cheap.

Used for respiratory protection of certain non-oily particulate matter, the filtration efficiency is not less than 95%. Suitable for people with allergies, elderly and children with weak resistance. Nose clips and ear straps are convenient, can fit the face well, foldable design, easy to store and carry. Its particulate filtration rate is only greater than 30%, and the filtration rate for bacteria can reach more than 95%.5.5/anti-flu/anti-second-hand smoke /8 hour one time, the price is about 13 yuan a.　　　

If you want to choose a higher filtration efficiency, you can choose KN95, or N95, or even N99 level masks.The N95 mask is not a brand but a standard. The N95 level means that the filter material in the mask can protect non-oily particles by 95%.　　　　KN masks are only used to filter non-oily particulate matter, such as: dust, acid mist, paint mist, microorganisms, etcAdvantages: Suitable for damp heat ring or long-term protection, it is a comfortable protective mask.　　　　 4, 3M 8210N95 breathing valve mask.5