OT unless you live in a war zone:
They call this a gas mask
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but isn't that very misleading. AFAICT, this only contains filters. My image of a gas mask is that it contains chemicals that neutralize mustard and other poison gasses. Or tear gas.
It also uses the word cannister, and in my English, a cannister is like a can, for liquids. The holder for a filter is called something else.
Yes, I know that Tmart sells cheap junk, and I don't expect much from them, but I figure the usual problem si that things don't work well or for long, not that they imply something as false as this looks.