These sets have been stamped with a blue ink that washes out easily after completion. (I know, one of my quilt tops was caught in damp weather at the festival. Fortunately it was all embroidered. The quilting will have to be remarked.) They are 50/50 poly/cotton. Remember the costs include shipping charges to the continental United States. International customers please email for shipping costs. Supplies of most are limited. This picture is of a quilt using 14" Sports Blocks.