Abstract: The field of the DISCLOSURE lies in adaptive materials for implementation in textiles, wearables and smart clothing. The present disclosure relates to functional fabrics or devices, comprising energy-harvesting fabrics or fiber-based materials which change characteristics upon stimulation with at least one stimulus selected from touch, pressure, friction or light. The present disclosure also relates to the use of said functional fabrics or devices, in particular as pressure or friction or touch sensor or in fabrics being in contact with body parts during walking or running. The present disclosure also relates to the use of said functional fabrics or devices as photo-voltaic or light sensors. The present disclosure also relates to electrostatic boost filter devices comprising said functional fabrics or devices, and their uses to filter particulate matter and/or to filter and clean air.