designer's own words:suno is a kerchief which is screenprinted with solar cells. Photosensitive pigments in the paint conduct the current through a layer of titanium dioxide directly to a USB port. The layer is few micrometers thick and is very resistant to abrasion. The size of the kerchief is chosen to allow to charge a conventional cell phone in about 1 hour. The kerchief is thought to be in different sizes and colors.