I am planning to use this filter as a general purpose filter. I can't tell if the filter is a fiber filter or paper - I think it's a fiber filter. It's housed in a screen like the one you'll find on your K&N, so it should hold up well wet or dry. I have another one that I plan to use for most wet environments but looks like it could be used as a wet vacuum. that it can dry completely. If you don't, it will form.