In this letter, a novel methodology using electrotextile fabrics is employed for designing a highly transparent, wideband frequency selective surface (FSS) in the millimeter-wave band. The standard metallization is replaced by a low-cost, extremely fine conductive mesh (RadioScreen or VeilShield) that gives to the periodic structure high see-through properties in the 27–35 GHz frequency band. An acrylic dielectric material that is easily available and very low-cost has been used as a substrate. Simulation and measurement results alike are presented to validate the principle. By assessing the high transparency properties of the FSS and its high performance in terms of stopband, this FSS could be seen as a potential candidate for multiple 5G applications like for on-chip shielding, autonomous vehicles, antenna and on-chip antenna devices, radar cross section augmentation, robotic guided paths, and electromagnetic interference protection.