This flexible fibre wall, which is only 1 to 4 mm thick, is a natural product made entirely of a pure plant-based, renewable material. It consists of salt crystals that refract and reflect sunlight depending from which angle they are viewed. The minerals and plant substances they contain promote good air quality and regulate humidity levels. In this way, the biodegradable material ensures good indoor climate conditions. It is suitable for use in public and residential spaces that are primarily intended for exercise, rest and relaxation.