The Sav 6mm filter doesn't block the airway entirely. Being triangular shaped, the smoke just kind of flows around it.
By the way, you can also use similar sized triangular balsa that you can acquire from hobby shops as well. $2 worth of Balsa will supply around 50 filters.
By the way, you can also use similar sized triangular balsa that you can acquire from hobby shops as well. $2 worth of Balsa will supply around 50 filters.
Given that each 36" stick yielded 20 filters, I made 100 of them for $3.82 [included tax in price].
https://www.hobbylobby.com/Crafts-H.../Balsa-Wood-Strips---3-16-x-3-16-x-36/p/68976
Having tried a couple of these, the answer is Yes: they do get a little soggy and gunky. That's the point, isn't it?