Oh, I see. Penetration depth depends on resistivity. A superconductor has a penetration depth of zero. A real material, it's non-zero. Carbon fiber is conduct

Oh, I see. Penetration depth depends on resistivity. A superconductor has a penetration depth of zero. A real material, it's non-zero. Carbon fiber is conductive, but not as good as a metal. Therefore I would expect penetration depth to be quite a bit bigger with CF. So, perhaps it's not a good idea to rely solely on CF for shielding. https://en.wikipedia.org/wiki/Penetration_depth https://en.wikipedia.org/wiki/Penetration_depth