Purely Gates Mylar gives our designs that wonderful sparkle and shine. We only use the Opalescent color of the iridescent tissue. Purely Gates Mylar tears away easily, does not shred thread, and does not dull your needle. It will pick up the color of thread that is stitched over it. Purely Gates Mylar can be washed, dried and ironed. Your embroidery thread will melt before the mylar will if you hold an iron on the thread too long. We always iron embroidery from the backside. Purely Gates Mylar is sold in packages of 3 sheets that are 18in x 30in.