Pure Silver Fabric Conductive Stretchy Faraday Cloth for EMF/RFID/EMI/RF Block
As such, they are conductive and also flammable. As an Insert in the Wallet or Handbag to Protect Your Credit Cards from Data Theft. Shielding: RF & LF Electromagnetic fields. Wear gloves when handling if your skin is sensitive to nickel, copper, or polyester.