The ALO Audio Litz wire cable has a smoky grey jacket. It is made of individually enamelled strands of silver plated copper. The cable's four conductors are protected with a durable medical grade PVC jacket. It is extremely flexible and resistant to oxidation. The cable has an over moulded 3.5mm stereo plug with beryllium copper MMCX connectors. The custom beryllium copper MMCX connectors are a huge step-up for ALO Audio's MMCX connectors giving them 100x the rated pull life of a standard MMCX connector. A longer life connector means a better connection for the life of your cable and your earphone. Custom moulded ear hooks without memory wire.