My favorite - in my stash - is Dream poly 80/20. I use it for machine embroidery projects and use it for quilts too. It can be doubled with good results. For example, the first layer of batting is put in with the machine embroidery/applique blocks. Then the quilt blocks are sewn together. The second layer of batting and backing is quilted with the top
Info here. I use the one in the pink bag.
https://www.quiltersdreambatting.com...rs-dream-poly/