A simple one-dimensional model simulating the combined gas diffusion through micro-perforations and the permeable membrane was developed as a designing tool for PLA based EMA packaging systems. By using this model, innovative biodegradable bio-based EMAP systems were designed specifically for selected fruits and vegetables using laser microperforated, water vapour (WV) permeable PLA films. It was shown that the relatively high water vapour permeability of PLA films compared to conventional OPP films allows the development of an optimised biodegradable bio-based EMA packaging for the specific applications.