n95 surgical face mask with valve

N95 face mask respirator may not be used multiple times, requires the use of disposable, and at the time of the disposable use, worn no more than 6 hours of time, especially the frontline medical staff in the process of using the surgical mask n95, must not exceed wore the effective time, once more than, mask protection will greatly abate, is likely to happen, some will be coronavirus infection situation is more dangerous.
In addition, during operation, if the 3m mask n95 is contaminated, deformed, broken or breathing is difficult, it also needs to be replaced immediately, otherwise it will easily cause cross-infection, or the protection is reduced.N95 mask protection is better, the filtration efficiency can reach more than 95%, for the air in some non-oily particles.

N95 surgical face mask with valve