It is called cambric.

Here is a link that might be useful: Cambric

It's the dust cover, here's a site that sells it.

Here is a link that might be useful: Warehouse Fabrics

That's it!! Thanks!!
I'll be bookmarking those websites too.
And, I'd like to share a great resource I found for discount fabrics:
www.maryjos.com
I found a fabric for less than $18 that was $36/yd at Calico Corners!

very cool Karezz, you should do a thread to let people know! I'm sure a lot of people would find that useful.