Mettler Thread - All Purpose Polyester Metrosene ThreadMettler Thread - All Purpose Polyester Metrosene Thread at discount prices! Mettler Metrosene thread is one of the highest quality all purpose polyester threads around. This is the perfect thread for all types of fabric. Mettler Metrosene thread is silky and smooth to the touch and has excellent gliding properties, no tension regulation necessary. Machine washable, dry clean resistant, press resistant to 392 degrees, color and light fast, sweat resistant, rub-fast and shrink free. 100% polyester. 100/3.