Wearable electronics come in many different shapes and forms. One obvious solution is nanoengineered functional textiles that will revolutionize clothing. The potential of nanotechnology in the development of new materials in the textile industry is considerable. On the one hand, existing functionality can be improved using nanotechnology and, on the other, it could make possible the manufacture of textiles with entirely new properties or the combination of different functions in one textile material. And then there is the quickly growing field of electronic skin (e-skin). Advances in materials, fabrication strategies, and device designs for flexible and stretchable electronics and sensors make it possible to envision a not-too-distant future where ultrathin, flexible circuits based on inorganic semiconductors can be wrapped and attached to any imaginable surface, including body parts and even internal organs.