Abstract: The invention relates to a plastic body with a microporous, waterproof and gas-permeable membrane for electronic housings. The plastic body has a metalized surface. Consequently, the plastic body and the housing act as a shield against the entering and leaving of electromagnetic waves. The metalized surface is preferably formed by a layer of electrically conductive material. This layer is applied to the surface of the plastic body by electroplating. At the same time, there is a high gas permeability of the membrane for venting of the electronic housing. The invention also relates to a method of producing a plastic body of this kind.