1. Cotton mask
Cotton masks once occupied the main market. The main function of cotton masks is to keep warm and prevent cold air from directly irritating the respiratory tract. Cotton masks have good air permeability, but cotton masks have almost no dust and antibacterial effects. If they are in high epidemic periods and haze weather, cotton masks are not effective.
2. Medical non-woven masks
Medical non-woven masks can be said to have quickly entered ordinary households from SARS. Non-woven masks can effectively prevent bacteria, and are limited to preventing infections caused by sprays. For example, they can prevent the spread of bacteria caused by sneezing. However, due to its poor fit, it cannot play the role of dust prevention. The editor sees that many friends wear this kind of mask on a hazy day, but it actually works.
3. Activated carbon mask
This type of mask refers to the addition of activated carbon in the interlayer of the mask. The activated carbon has a strong adsorption capacity and can effectively prevent bacteria and dust. However, this type of mask will make breathing difficult and will be prone to hypoxia after long-term use.
4. Dust mask
Dust masks are generally cup-shaped, which can effectively fit on the mouth and nose to achieve the effect of dust prevention.
5. N95 and above masks
