What mask to wear in foggy days (what mask is better to wear in foggy days)

The continuous "smog" weather has made everyone worry about the impact of air quality on the body. I usually wear a mask when I travel, but what mask can really stop the harm of smog to the human body? What mask should I wear in foggy days?

KN90/KN95 protective mask

What do KN90 and N95 masks mean respectively? If the filtering ability of the mask to fine particles with a diameter of less than or equal to 2.5 microns reaches 90%, this mask is called KN90 mask, and if the filtering ability reaches 95%, it is KN95 mask. This professional mask can effectively prevent smog and viruses. Accordingly, this kind of mask is airtight, and if the breathing frequency is too fast, it is easy to cause poor breathing.

Service life: 40 hours ~ 1 month, not washable.

Solemnly remind: KN90/KN95 masks should be worn under the guidance of professional doctors. Children, the elderly and special people with respiratory diseases and cardiovascular diseases should choose carefully.

Gauze mask

Gauze masks can only filter larger dust particles, so they are suitable for cleaning.

Service life: disposable.

Tips: gauze masks do not have the function of filtering PM2.5, and it is ineffective to use gauze masks to prevent smog.

surgical mask

Surgical masks refer to masks worn by patients with respiratory symptoms such as cold, fever and cough, and can also be used as anti-influenza masks in crowded and poorly ventilated places.

Service life: disposable.

Tips: surgical masks do not have the function of preventing PM2.5 particles.

Activated carbon mask

Activated carbon masks can adsorb organic gases and toxic dust, and toxic gases or acne will be adsorbed on the surface. After adsorption saturation, it will start to release toxic gases, with acne and no bactericidal effect. When they need to breathe hard or can't absorb odor, they should be replaced immediately. They are only suitable for painting or spraying pesticides.

Service life: disposable.

Tips: surgical masks do not have the function of preventing PM2.5 particles.

PM2.5 standard

The Chinese name of PM2.5 is fine particulate matter, which refers to fine particulate matter with a diameter less than or equal to 2.5 microns. The concentration of PM2.5 in the air is the current testing standard to measure air quality. The standard of air quality PM2.5 in China is: when the concentration of PM2.5 is 0~35 μ g/m3, the air quality is excellent; When the concentration of PM2.5 is 0~35 μ g/m3, the air quality is excellent. When the concentration of PM2.5 is 35~75 μ g/m3, the air quality is good. When the concentration of PM2.5 is 75~ 1 15 μ g/m3, the air quality is slightly polluted. When the concentration of PM2.5 is 1 15~ 150 μ g/m3, the air quality is moderately polluted. When the concentration of PM2.5 is 150~35 μ g/m3, the air quality is heavily polluted. When the concentration of PM2.5 is greater than 250 μ g/m3, the air quality is seriously polluted.