The overall goal of this project is to effectively utilise materials extracted from bio-refinery streams of forest resource (FORE) for flexible packaging and other applications. For this purpose, the project will investigate the fundamentals of mechanical and mass transport properties of fibre networks through experiments and modeling and simulations. The mechanical properties include deformability of fibre network under moist/high temperature conditions, and the mass transport properties concern water-vapour transfer rate. The main focus of the experimental work will be on constructing the system for measuring water-vapour transfer rate without any artifact. This will be followed by microscopic investigations of the structure vs. mechanical/barrier performance of different fibre-based materials. Based on the experimental results, modeling and simulations will be performed on a meso-scopic level to study fundamental mechanisms and to explore the parameter space of optimum structures.