An analysis of shielding effectiveness (SE) of the shielded tents made of the metallised fabrics is given.First, two electromagnetic characteristic fundamental for coupling through Scene Setters electrically thin shield, the skin depth break frequency and the surface resistance or transfer impedance, is defined and analyzed.Then, the transfer function and the SE are analyzed regarding L-Cysteine to the frequency range of interest to the Electromagnetic Compatibility (EMC) Community.