Some suggestions on choosing N95 masks with valve

For ordinary people, the use of disposable medical masks and medical surgical masks can already achieve a good effect of blocking droplet nuclei, especially droplet particles. And because the ventilation resistance is small, it can be worn for a long time. In order to achieve better protection, I think daily protective masks or PM2.5 protective masks with higher filtration efficiency can also be used when necessary. Medical protective masks and N95 protective masks have high breathing resistance and high cost, so they are not recommended for ordinary people. .

There is a V at the back of the mask model with valve. The breathing valve is a one-way valve, and the airflow can only go from the inside of the mask to the outside of the mask to reduce the resistance of exhalation and improve the wearing comfort without affecting the user’s protective effect. Medical masks are not allowed to have valves. When infected or suspected to be infected, you must also choose masks without valves.