Cambric is also known as dustcover or black bottom. This is a non-woven, synthetic polypropylene fabric and is most often used on the underside of furniture the backside of headboards or use it under lamps bases to keep from scratching your furniture. It makes a neat finished product. a neat finished product. This item is 1.25 ounce, 36" wide, white in color, and is sold by the yard.