If you wear a gas mask there is still harm

Depends on what you are preventing, and gas masks use different filter cartridges depending on the harmful gases in different environments.

The way to clear the dust: the protective effect of the gas mask depends on 2 aspects. One is the protection level of the cartridge. The second is how tightly the mask is integrated with the face.

So the mask must be divided into sizes, not divided into sizes of the mask and the face of the fit effect varies from person to person.

The way to clear the dust: scientific selection of gas masks certified by GB2890-2009 standards, help prevent harmful gas injuries occur.

1, choose the compound half mask type.

2, choose the appropriate level of filter cartridges to use. Low protection will result in bodily harm.

3, choose silicone material is more comfortable. Suitable for long time wearing, not easy to trigger allergic reactions. Hardness masks are easy to cause facial indentation.

4, the mask is divided into size, this is extremely important. Do not buy those so-called universal model mask. Easy to leak.

5, the mask has a full mask and half mask. One of the most commonly used half masks cover the mouth and nose, cover the mouth and nose, jaw 2 kinds, it is recommended to use the latter, relatively more comfortable.

6, it is recommended to choose a smooth breathing mask. Some use double cartridge design, relatively smooth breathing.

7, it is recommended to choose a smooth-breathing mask.