The main concept is a demonstration of a special kind of fabric with the ability to clean any possible dirt on it by the sun’s irradiance.
Rivas is my suggested material since its abundance and flexible stem to facilitate the manufacturing. I am aware that Nanotechnology has made a lot of advancement in the energy absorption from irradiance. As I do not have any engineering proficiency, I am not sure about what kind of nanotechnology must be applied to the fabric for the energy absorption.
Therefore, when any type of filth appears on the fabric, the sun’s irradiance shifts the fiber’s crystal and molecule’s chemical characteristics and positions to the primary pattern. By then the hygiene process would happen.