In the last years, safety regulations have become more stringent also in the area of the commercial vehicles, from vans to trucks. All security systems require an ever greater attention in their design, both the ones for active and passive safety. Among these, a crucial role is always played by the airbags. The object of this thesis, done at CNH Industrial, is the characterization of an Iveco Daily airbag finite element model comparing the results of the experimental tests conducted on the real airbag and that of the computer simulations. Being an airbag a cushion of various fabric material components, that inflate after an accident, it has gas losses through the seams and due to the porosity of the material.