Question concerning core

[sewingmisfit]

I've finished all the pads I cut and prepped the materials for in my last post. I'll probably post a picture tomorrow if I have time. What I was really wondering, though, has anyone used just plain flannel for the core and how did that work out for them? I have some less than pristine, though still pretty, flannel that I've cut tops out of and I also have quite a bit of reclaimed solid flannel from a sheet.

Would anyone recommend a flannel core or is really just appropriate as a light/pantyliner sort of pad? I can't imagine using lots and lots of layers of flannel for a thicker pad, wouldn't be terribly flexible. Anyway, thoughts anyone?