an apparatus that includes a flexible base material and a flexible conductive material formed on the flexible base material . both the flexible base material and the flexible conductive material have shrinkable and / or stretchable properties . the flexible base material may include a shrinkable polymer , which may shrink up to 500 %. the flexible base material may include a stretchable polymer , which may be stretched by at least 1000 %. these stretchable and shrinkable properties may be exhibited without substantial functional degradation of either the flexible base material and / or the flexible conductive material .