How to choose an anti-fog mask

1. Common gauze masks on the market can block large particles, but masks with a diameter less than 5 microns can't stop them, and they can't stop PM2.5

2. Disposable medical masks are also not suitable for pm2.5 prevention. Disposable medical masks are made of hygienic thin non-woven fabrics, which are mainly used for daily health protection of medical staff. Generally, there are three layers, the inner and outer layers are filter paper and the middle layer is non-woven.

3, absorbent gauze mask is not suitable for pm2.5 prevention. It is made of absorbent gauze, soft and breathable. Used for general health protection, with different specifications such as 12 layer, 16 layer, 18 layer and 24 layer. This mask is made of different layers of gauze folded and stitched. Particles are blocked by layers of gauze, but this blocking effect is extremely poor. If it is to keep warm, you can use it.

4. General cotton masks are not suitable for pm2.5 prevention. There are two layers of cotton cloth and one layer of cotton wool inside the mask. This kind of mask usually only has the function of keeping warm, and the claimed dustproof refers to the dust with large particles, which is not suitable for use in foggy days.

5. Protect pm2.5 professional N95 masks. N95 mask is one of nine kinds of anti-particle masks certified by NIOSH (National Institute of Occupational Safety and Health). "n" means not suitable for oily particles; "95" means that the filtration efficiency reaches 95% under the detection conditions specified by NIOSH standard. That is to say, the N95 mask is tested with 0.3 micron sodium chloride particles, and the blocking rate must be above 95%. When testing the tightness of the wearer's face, make sure that the air can pass in and out through the mask under the condition of being close to the edge of the face. "N95 mask" can block the flow of 0.3 micron particles, so it can also block 2.5 micron particles.

In foggy days, you can choose to arrange MIA fresh air system for your home. It uses the function of ventilation to continuously discharge indoor dirty gas outside, and at the same time, it sends outdoor fresh air purified by machines indoors to ensure the freshness and cleanliness of indoor air.