After Mt St Helens, the locals used panty hose as a prefilter for ash.
Reportedly worked well.
Reportedly worked well.
I called Outerwears and gave them the dimensions. The part number they sent me for the Steeda filter is 20-1172-02.Looks good! I have tons of pollen near where I live and it wouldn't be a bad idea to pick one up myself. Do you have a link to where you found it on their website?