These hexagon sound absorbing panels are made of wood slivers, cement, and water. Träullit Hexagon Panels by Form Us With Love -- seen on: 19 Ideas For Using Hexagons In Interior Design And Architecture //
These wall tiles by Mauricio Affonso are made from the luffa plant. They are strong, light weight, breathable, highly absorbent and completely biodegradable. Can be used as acoustic wall tiles in the home or office.