Used while driving a motorcycle abroad. Diesel exhaust gas and dust are amazing places, but it is comfortable just by using this. However, since the shield does not tighten to the jet helmet, it is better for those with two filters on the side. There was no problem in running with rain.
A few years ago, we needed a R2 type mask for the welding work, and after the trial and error I came to this. It is wonderful that filters are not disposable, but they can be washed and reused. From now on this is it!