The worst thing about this mask.... I bought it for the heater for simple use and still the smells pass through.

It does not fit well on my face, when I tighten it to apply it, it becomes difficult to breathe and the woolen cover it has for insulation between the face and the mask does not even work. The strap broke on one of the masks (I bought two). There are more quality ones available.

As a mask, it was good, but it was something like a cloth that you had to place and it didn't fit, I tried for half an hour and it didn't fit. Also, it had some kind of black powder on it, I don't know if it was in the areas where the air entered. Overall, it was okay