Flexible and wearable technologies are gaining wide attention with their promise of applications in sensing, electronics, and energy. The materials involved should be flexible, lightweight, robust, and non-toxic. Natural biopolymers such as silk, chitin, collagen, cellulose, and gelatine have these properties, with the additional benefits of low cost, renewability, and biocompatibility. Taking a closer look at these soft materials and their forms reveals novel multifunctional abilities, pa...