Sustainable Products, Projects and Green Design Kuss Acoustic Panels by Estere Savicka Kuss are sound absorption panels designed to bring calmness into homes, open offices and any other public spaces by absorbing the excessive noise. Panels are made out of ecological and non-toxic composite by using organic rich lake sediments, sapropel as a binder, mixed with natural fibres. The extraction of sapropel helps to improve the quality of freshwater resources and lake ecosystems. By using the extracted sapropel in design production, both the noisy city environment and the ecosystem of a lake are improved.