[moderator note: the masks we can get from Costco or other places in Canada are "3 layers" masks and won't exhibit results shown in video, which I believe are single or double layers only.
So remember there is a difference between masks type with different number of layers. Get the 3 layer ones]
Australian report on how useless masks are if they're not N95 masks (and see moderator note above)
So remember there is a difference between masks type with different number of layers. Get the 3 layer ones]
Australian report on how useless masks are if they're not N95 masks (and see moderator note above)
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