This project explores the potential of tree bark as a sustainable material. In collaboration with the Max Planck Institute, bark is compacted binder-free using a hot pressing process and then further processed using CNC technology. CT scans help to analyze and optimize the material structure. The aim is to establish bark as a valuable raw material in product design and to demonstrate its aesthetic and functional qualities. A piece of seating furniture serves as a demonstrator to show stability, modularity and design diversity. The interdisciplinary exchange between design and science creates an innovative, sustainable material that enables alternative utilisation concepts for the residual material and makes a contribution to the circular economy. The project was created as part of irreguLAB, a teaching laboratory for digital design and fabrication with irregular materials.