I made a couple polyester quilts made from old pants suits and trousers. I cut 4" squares, made 25 patch blocks because I could get about 16 good patches from each pair of pants, after cutting out the stains and snags. Put a sheet on the back and then tied the quilt. For binding I just turned under the edge of the poly. My son was 2, gave both quilts to a friend when he was 20 and she still has them. Made them in 1971.

This quilters board brings back many memories.

I bought a bunch of polyester fabrics when I decided to restart quilting - garment polyester - used to make girls' dresses, blouses and such. Then I learned 100% cotton was the best to use. Cotton fades and wears differently and should not be mixed as the polyester will last longer and hold the color better than cotton. I made quite a few before and they are still in good shape. I plan to make more - some day. I hand quilted them, don't know how I will do these - if I ever get to them. If I tie I would use crochet thread, don't know yarn would hold up well enough. I would use the same kind of fabric for the backing also. Just my 2 cents worth.

i found and brought one from a thrift s store my,s in pinwheels and it tied in each corner of blocks

I recently had some poly tops given to me. I always use ball point needles on it. I machine tacked them with a heart design (from my Pfaff 7570)& I hope the charity recipients notice I sewed some love into them.

I've heard that that material wears like iron. Really! Indestructible stuff. The hardest part is making the quilt because of its tendency to stretch. Once the quilt is made, it lasts forever.

I like the idea of spray basting to keep the quilt sandwich stable.

I would also experiment with heavily starching the knit fabric to see if that would stabilize the top also. I heavily starch my backing fabrics by mixing a 1:1 solution of Sta-Flo laundry starch and water, "painting" on the solution with a large wall painting brush, drying in the dryer (for a pieced top I would probably lay it flat somewhere to dry), then iron (not sure if I would want to iron a top made of the heavy knit fabrics; would have to experiment to see).

Anything you can do to keep the knit fabrics from stretching while you put the top together will help. Starch and spray basting come out of the quilt with its first washing.

re my last post about thin knit polyester for backing. Hobby Lobby has some called travel knit that is the same thing.