The device according to the present invention may be used for the realization of any kind of curtain, for exterior and for interior, as well as for the manufacturing of working clothes and accessories, and it mainly consists of a fabric of metal threads (1) and natural or synthetic yarns (2), that determines the realization of a net-like defence with continuity solutions of smaller dimensions that half the wave length of the radio-waves, which therefore can not overcome it.
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