This part of IEC 63203-201 specifies the terms of conductive fabrics and insulation materials used for electronic textiles and measurement methods for their properties. Conductive fabrics covered by this standard are basic materials in electronic textiles and are mainly used as conductive traces, electrodes and the like in clothes type wearable devices. It does not include high resistance conductive fabrics used for antistatic purpose and heater applications. Insulating materials handled with this standard are materials used for electrical insulation of conductive parts in electronic textiles. They include materials for covering the conductive parts, and general fabrics constituting basic structure of clothes type wearable devices.