i e the production of a bacterial biopolymer layer 4 on the woven fabric 1 can be obtained in embodiments of the invention the bacterial biopolymer layer 4 is a non uniform layer i e it has a thickness t which is variable throughout the extension of the bacterial biopolymer layer 4 in embodiments of the invention the bacterial biopolymer layer 4 is a discontinuous layer i e is an interrupted layer thus providing areas of the woven fabric 1 which are not provided i e not covered with the bacterial biopolymer layer 4 fig3 is a perspective view of a portion of an exemplary composite fabric 10 as obtainable after step d of the process of the invention i e a dyed composite fabric fig3 shows in particular the bacterial biopolymer layer 4 after dyeing similar to fig2 the bacterial biopolymer layer 4 is schematically represented as a continuous and uniform layer i e a layer that covers continuously i e without interruptions the front side 5 of the woven fabric 1 and that maintains substantially the same thickness t over its entire extension however as above mentioned in embodiments of the invention the bacterial biopolymer layer 4 is discontinuous and or non uniform the back side 6 of the woven fabric 1 is also indicated in fig3 in this case the back side 6 of the woven fabric 1 corresponds to the back side of the composite fabric 10 fig4 shows a perspective view of an exemplary embodiment of a treated fabric.