Marktek is a company that provides EMI (electromagnetic interference) shielding and conductive, resistive, and microwave-absorptive materials. Its products include piezoresistive fabrics and leather, electrically conductive fiber, yarns, and threads, resistive wires, metalized fabric tapes, etc. The company serves antenna systems, medical, skin electrodes, anechoic and semi-anechoic chambers, resistive heating, and other applications.