1. Military Shielding MaterialFaraday fabric is crafted from 20% top quality copper nickel polyester. This exceptional composition provides excellent conductivity, shielding effectiveness, and thermal conductivity. The faraday cloth excels at effectively blocking a wide range of signals, boasting an impressive 99.99% blocking capability in the frequency range from 10khz to 30ghz. 2. 99% Blocking EfficiencyMade from a unique blend of metallic copper, metallic nickel, and polyester fibers, faraday fabric effectively blocks electromagnetic fields (EMF) and electromagnetic interference (EMI) to guard you against harmful frequencies and data breaches. Block signals from cellphones, WIFI, Bluetooth, and GPS. Anti electrostatic/esd /radiation/microwave shielding. 3. Large Size for CraftingCopper nickel faraday fabric is easy to cut and sew, usage for bags, car keys and router bag, curtains, tents, etc. Effective shielding for celltowers, microwave signals, phones, smart meters, security systems, radar, military broadcast, etc. as an insert in the wallet or handbag to protect your credit cards from data theft. 4. Work for SecurityFaraday fabric unique blend of copper nickel creates a powerful shield against electromagnetic interference. Whether you need to create signal proof rooms or tents, the fabric provides unrivaled protection. Also used for high frequency electromagnetic: industrial high frequency furnace, mobile communication, signal transmission stations, medical instruments and other industries.