yeah it works fine, I'm just concerned about sweat as I use them to mow and exercise. I'm not sure if that paper under the mesh even was to help prevent moisture getting through, but if it was I just want to be sure I'm not risking them.
I mean, obviously if the seal is tight sweat shouldn't be getting into the canal anyway so maybe it isn't a huge deal; I'd still like to replace it with something if possible. Maybe I'll run by a craft store later and see if they have any sort of mesh I could just cut to fit. That sheet under seemed like it was just felt paper or something to let sound through and keep out stuff.