Silky, smooth, and available in an array of tempting colors, these Perle cotton thread sets are the perfect way to embellish your projects! Each 100% Egyptian cotton spool is mercerized for strength, is colorfast, and shrink-proof. The high-quality thread is perfect for embroidery, applique, sashiko, and more. 10 gram balls, color reference numbers: 1227, 1237, 1902, 2627, 3405, 4368. Presencia uses a Z (left) twist, the most common for use in sewing machines. The direction and balance of the twist are important to prevent thread from looping and knotting.