Prism99

Are you planning to hand quilt? Or machine quilt?

Edit: I'd be interested in which online quilters say not to use cotton thread for a wholecloth quilt and what their reasoning is.

As an aside, rayon thread in general is not used for piecing or quilting because it is a relatively weak thread that cannot stand up to abrasion.

If using a carded wool batt from a local mill, you may need to enclose the batt in cheesecloth before layering in order to guard against the wool bearding. Hobbs and Quilter's Dream wool batts are made with newer processes that dramatically reduce the chance of bearding, thus eliminating the need to encase the batt in cheesecloth.