LIBERATOR 40 Highly Conductive Silver-coated Thread for E-Textiles and Other Wearable Electronics - 200 ft. This highly conductive yarn (1 Ohm/ft) is made of a polymer inner layer surrounded by a metal outer layer This thread is easily sewn, soldered, and embroidered The inner polymer yarn is 5 times stronger than steel giving this fiber an extremely high tensile strength Superb conductive/metal layer adhesion to the inner polymer thread Flexible like regular thread