There are a couple of things that happen when you use a cotton/poly blend in your quilts. One is that the fabric stretches when being sewn and quilted, and may not go back to it's original shape, leaving you with an odd looking block that doesn't square up, or puckers in your quilt.
The other, and most important, is that when burned, cotton turns to ash and falls away. Poly melts, and sticks to the skin, continuing to burn the child or person long after the fire is out.
I only used 100% cotton in my quilts.
Originally Posted by kakels
Just curious. Why not use poly/cotton? What happens to the quilt when you use it?