The basic construction of the new super-stretchy wires is an elastic tube filled with a highly conductive liquid metal alloy. Other attempts at stretchy wires, say the researchers, have relied on embedding conductivity into elastic, as opposed to separating them. The wires can be stretched up to eight times their original length, which is pretty amazing–an order of magnitude more stretchy than existing stretchy wires. The paper appears in Advanced Functional Materials. NCSU