DMC Pearl Cotton is a highly mercerized, non-divisible, lustrous 100% cotton thread. The twist of the thread is how it received its "Pearl" description and DMC's Pearl Cotton is best known as the most beautiful thread in the world. During the manufacturing process, the thread is combed, singed by flame and then double mercerized. It is this double mercerizing which gives it its beautiful pearlized sheen. The thread is soft, silky, does not fluff or kink, and 100% colorfast. Pearl Cotton is a supple thread that provides wonderful volume and dimension to your embroidery.