My concern is the poly/cotton blend - it will shrink at a different rate than the all cotton front. The 2nd concern is the high thread count - is that going to be difficult to quilt? I have finished a quilt for a woman who used a sheet on the back, but the backing was about 25-30 yrs old, so the thread count wasn't as high as they are today.

I dislike the feel of polyester and, even though your quilt may not be touched very much on the back my personal view would be that it would make a quilt less appealing to have one side that did not feel nice to touch.

Thanks for all the support. It's wonderful to know I can come to the Board with a problem and get quick and thoughtful insight. I lost the receipt and cut one of the pillow cases just to see how it would work. I found out there will probably be an issue with the spray basting sticking to it also. Joann's has a 20% off everything coupon so I may see if I can get something else and just adapt the sheets to my bed. One of these times I'll have a project that just happens and skips the problems. LOL

Hey, if you bought a ''set'', why not use the pillow case as a test......sew together some scraps of the SAME quilt fabric and use the SAME batting, quilt as you plan to on the real quilt, then throw it in the washer and dryer and see what happens....might be surprised in a ''good'' way!!!

I didn't think they made sheets in 100 percent poly... do double check! I have seen blends but not 100 percent particularly in a high thread count.

Thanks for the tip. I have a "sample" to practice my free motion quilting on so I'll try washing it when I'm done and see what happens. Maybe I will be presently surprised. If it doesn't work out then I'll get a different back. I have to figure out how to quilt it anyway. It does say on the package"our plush micro-fiber fabric has a hand feel and texture of 400 thread count bedding." Ah ha, pays to read the whole blurb. It says 100% polyester only on the sheet itself. The fact that it was made in China does not please me either, but paying $20 for the set, I didn't notice. Always "lessons learned."

Have you thought about using a muslin back. Some of them are really soft and have a nice feel.

or find a 108 backing. I picked up some at JoAnn's a while back on half of red tag price.

Now that you said "micro- fiber" the 100 percent poly makes sence. Go for it once you have your sample to owrk through the right needle, thread , and tension issues .

I probably wouldn't use 100% poly. I would a poly cotton though.
More important - hand quilting a 400 count sheet would be very difficult

I have used the minkee and it is polyester for the back of a quilt, just did not quilt it close kept about 4 inches between design. Since it was heavier I did not use batting inside and it turned out wonderful. I had needle issues, but my LQS sold me some stuff called "Sewer's Aid" and I put a few drops on the bobbin thread and on the spool of top thread and that fixed my skip stitch problem. It took some time to get the tension set right but just practiced on a scrap before hand.