Mettler Silk-Finish Cotton Embroidery Thread, 875 yd, Black SILK-FINISH COTTON 60 is your perfect piecing, fine stitching and fine embroidery thread Quilt, sew and embroider with confidence knowing that SILK-FINISH COTTON 60 has been mercerized to add strength, and color fastness, while giving it that Mettler silk finish The high breaking resistance, shrinkage control and ironing capabilities make COTTON 60 a top choice among quilters and sewists