I sometimes use old clothes. Jeans make nice rag quilts. I also use mens shirts. I look for 100%cotton. You can make tshirt quilts. Just look for tutorial. Also, in the quilts I make for family just to be used and loved I recycle flat sheets for the backing. I know many don't like to do that but they work well for me, are very washable and I buy them cheap at thrift stores and yard sales. The most I pay is 2.00 a sheet which is a whole lot cheaper than buying backing fabric and my friends and family who are gifted with the quilts don't seem to mind.