I'll have the numbers for fabric softener sheets (bounce and snuggle) as well as pantyhose later this evening. I snapped some photos of all of the manufactured filters and will add them to the thread, as well. Just from "eyeballing" the fabric softener sheets, I can tell that they're not going to perform as well as the meshes as far as dust/fur intrusion goes - they have larger percentage of open areas than the meshes. I'd also worry about the fabric softener gel/goo getting sucked off the sheets and blown into the computer.