What is the difference between Radio Frequency (RF) versus Extremely Low Frequency (ELF) shielding?

What is the difference between Radio Frequency (RF) versus Extremely Low Frequency (ELF) shielding?

Radio Frequency (RF) shielding is the reduction or elimination of high frequency signals up to 5 GHz. Materials shield RF frequencies by creating high conductivity with little or no magnetic permeability.

Extremely Low Frequency (ELF) shields are highly permeable. ELF shields attract magnetic fields and divert the energy through them.