Although it is not in the description, it is a special fibrous activated charcoal filter, it is another site that can generate ozone, which is generated during welding operation, etc. It seems that we are using it in welding because it is written as if another kind of smell is worrisome, but this one is more suitable for welding in terms of price. I am using three kinds for now, but I am satisfied without the smell which is worrisome with this. With just a work mask, drinking saliva will also become resistant, while looking at the smell, but it is glad that it will be a clean work as it is completely gone.
Because it can be used for masks with few convex parts, it is useful for automatic welding light shielding surface. I think that it is a reasonable price from the contents of the effect, but I think that it will be possible to exchange frequently if the price goes down a little more.