No, My sister aksed for basic surgical masks.

Those are not as effective as M3. But she said it is really difficult to breath though M3, especially during summer time.

Bacteria is not the main cause of PM 2.5, but if you can afford to buy and can breath though those masks, why not.  

所有跟帖： 

• N95可以。有的人不舒服。因为本来就不是让你天天带的。俺们也就是做某些实验时用。 -知人知面- ♂ (0 bytes) () 04/27/2014 postreply 22:36:04