Researchers from Iowa State University has developed technology to make solar wearables. Utilizing the Digital Textile Printing technology, researchers is able to integrated photovoltaic thin film cells into wearables.
They have created a solar tie. The tie was constructed from a commercially available tie pattern. A small elastic pocket was sewn onto the back of the tie to provide a holding place for the phone and the charging wire. There was adequate slack provided in the wire to compensate for any elasticity in the fabric.