M.I.A.'s clothing brand is looking real good now. There are others but hers was the first I heard about. Seems like the waist bag would be critical for activists.
From the Ohmni website:
"...fabric's work by utilizing the principles of a Faraday cage to block or shield against electrical signals, electromagnetic radiation (EMR), and radio frequency interference (RFI)."
From the Ohmni website:
"...fabric's work by utilizing the principles of a Faraday cage to block or shield against electrical signals, electromagnetic radiation (EMR), and radio frequency interference (RFI)."