I made a few. The first I made were poly as it was only batting I could get hold of. I made these quillows for young nephews to take camping. They did find the closed cushion and poly difficult to cope with. I made the next batch without closed cushion with tabs joining the sides. The 5 year old found this easier to use.
Then I started making them with warm and natural. I also started using a bag or a loose cushion cover to hold either a normal size quillow quilt or single quilts. The warm and natural was thinner than poly and easier to put in cushion but warmer. I love to keep quillows in the car for children to sit on or lap quilts.