60% dyed cotton and 40% polyester in black with scrim. Our Black Cotton Blend is great for machine quilting but also suitable for hand quilting and particularly good for quilting with dark fabrics. All our cotton in our wadding blends is ethically manufactured to the highest quality with UltraClean carding used to ensure the removal any foreign particles which may tarnish finished quilts or damage sewing machine needles. 2-5% shrinkage when washed. Up to 10 inches between stitches.