Cool, but the whole time I wanted to know what a skater's solution was to respiratory masks. I was let down. Even by the linked article.
Me too. Me too. I scoured around for those, but couldn't find them. I'll try and reach out to the original authors of that research to see if I can drum some up.
It quotes interesting research and doesn't leave even a cursory link to it, expecting you to take them on their word.
The very first sentence mentioning the research links to an article they wrote for further info.