When fabric is referred as 'quilting fabric' they mean its 100% Cotton. Don't use polyesters, satins, homespuns, corduroys, velveteens or the like unless you are making a Crazy Quilt (not for tossing in the washer). Some 100% cottons are better quality than others. Don't buy any thinsies. Put your hand behind the fabric and see if you can see the outline of your hand. If you can, its too thin. Good cotton has a good 'hand' or feel to it. You'll get the knack in a little while.