Take yeast, bacteria and sweetened green tea – this mix becomes a biodegradable, resistant and highly flexible material after a fermentation process. How it works? Microbes spin nano fibres of bacterial cellulose onto a surface. Once this layer dries, it becomes a solid material with properties very similar to leather. The thickness of the fabric can be easily adjusted during the growth process: Depending on the duration of the growth, it either becomes more unstable and thinner or firmer and thicker. Depending on the thickness, different nuances and different translucencies are created in the material. With these material properties, there are various design possibilities: For example, when wet, a texture can be applied that remains visible even when completely dry. The colour of the fabric can also be easily changed due to its high absorption capacity. Trial and error therefore pays off. Experiments with plant dyes and dyes from fruit waste have resulted in a fabric collection with bright colours, different light transmission and varied patterns.