TPR is a new type of wire material with excellent texture, very flexibility and elasticity, and it also can be used for the headphones. Fire-resistance in European environmental standards ROHS, including halogen materials flame resistance to meet UL standards. Material of hardness from Shore 70 to 95 degrees has excellent texture, UV resistance and anti-oxygenic to ensure the surface to be dry and not sticky; Anti-acid, Anti-alkali, non-fuel is non- framing materials that do not cause harmful gases, and easily in processing, injection or extrusion molding.