1. Military Shielding MaterialCopper nickel is a popular insulative metal due to its high electrical conductivity and effectiveness in signal reduction. Our faraday fabric made of 20% copper nickel. Shielding rating from 10KHz to 30Ghz, surface resistance 0.05Ohm/sq, shielding effectiveness: 80 90dB, operating temperature 4℃ 85℃, thickness: 0.08mm, blocking 99% of wireless frequencies. 2. 99.99% ProtectionFaraday fabric blends polyester with metallic copper and nickel, creating a conductive grid similar to a faraday cage. Highly electrically conductive, RF/EMI/EMF/IF blocking, super earthing/grounding fabric/anti electrostatic/esd /radiation/radiowave/microwave shielding electromagnetic fabric. Block signals from cellphones, WIFI, Bluetooth, and GPS. 3. DIY Enclosure as NeededThis shielding nickel copper fabric can be used to line in your pockets, make RFID anti theft wallets and to wrap your credit cards, to line your hat, or to make a pouch for your cell phone, smart key, or anything that accepts or transmits these types of signals. 4. Satisfactory Practicality on Various OccasionsAs disruptive signals can come from inside or outside the home, more and more homes are using these faraday fabric to create enclosures against exposure to unwanted signals. This versatile fabric is perfect for crafting signal shielded rooms, wall coverings, tower emf shields, communication base stations, and wireless transmitting devices. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store