I worried about that for awhile and then I said, "what the heck," and started using sheets from the thrift store. (Cheap prices!) I actually like the look. The sheets are slightly worn and feel very soft. I'm actually using both blends and 100% cotton together in an every day quilt that I'm making now. I plan to back it with 100% cotton, so it will still pucker up when washed.
~ Cindy