Electrically shielded article

An electrically shielded article, comprising:

• a) a porous, flexible, and reversibly-elongatable substrate comprising:
• i) a matrix comprising a polyolefin;
• ii) a substantially water-insoluble inorganic filler comprising silica distributed throughout the matrix;
• and
• iii) a network of interconnecting pores communicating throughout the substrate;
• and
• b) a conductive ink applied as a continuous coating over at least a portion of the substrate, the conductive ink comprising:
• i) a resin comprising a vinyl chloride-containing polymer or copolymer, or a styrene-containing polymer or copolymer;
• and
• ii) a conductive material,
• wherein the conductive ink is applied over the substrate in a pattern such that the conductive material in the conductive ink is present over the substrate in an amount of at least 5 g/m2,
• wherein the electrically shielded article exhibits a signal loss of at least 5 dBm at up to 4 mm according to the NFC Detuning Test, and
• wherein the electrically shielded article substantially maintains a baseline conductivity after relaxation from stretching up to 10% elongation.