My Lizzie seams to like poly or poly cotton blends best on top and bottom have tryed 100% cotton but have many tension problems at one point had new needle , cleaned everything,encluding tension disk, double checked how threaded, after rethreaded, tension so loose had a rats nest on bottom and thread still snaped. changed thread to Poly blend tightened tencion and works great.I do not show my quilts just do them for myself have had no problems so far with quilts comming apart or excess wear on fabric.