I just finished a raggy/shaggy baby quilt using denim & corduroy for the back--flannel for the front. I like it but my sewing machine did not like the corduroy at all. Denim was no problem but the corduroy kept shredding my thread. I'll use a heavier thread and a slight zig zag the next time I use corduroy. Mine was all recycled jeans and leftover flannel & batting scraps.