I know some of you die-hard quilters will most likely faint at this but our group uses Curtain interlining!!!!!!!!!!!!!

I get it from this Ebay store http://stores.ebay.co.uk/Roomserve-F...34Q2ec0Q2em322 it comes in Poly mix and cotton in different weights. Angelika Monks a well known quilter who does beautiful hand, and machine, quilter uses it a lot and I must agree with her, it's fab.

I would stay away from fleece and wool....and go with just a nice weight flannel for 'something' in the middle....
make sure however that you really really wash it as it will shrink, shrink and shrink.....
The end product should be lovely with only a minimal weight to it but something to quilt to.....

I rarely if ever disagree with Holice -- we're both old school, I guess -- but Thermore is polyester and ANYTHING synthetic creates heat or holds in natural heat, to my way of thinking.
I'd use a lightweight flannel or nothing at all if I were making this one.

Jan in VA