Syncwire UNBREAKcable - Superior Quality Apple iPhone Charger Strengthened Construction UNBREAKcable is produced using an extremely advanced proprietary hybrid of ultra-high molecular weight polyethylene and other materials, resulting in a plastic that is a full 40% stronger than common cables. Ultra-high molecular weight polyethylene, toughened aramid fiber core and laser-welded connectors ensure superior functionality under heavy usage.