Surface Resistance: Below 0.03 ohm , Average Attenuation of 85 dB from 30MHz-18GHz. Material: copper+polyester , plain type , golden color, This Creates a Conductive Grid That Corresponds to the Idea of a Faraday Cage. Highly Electrically Conductive , RF/EMI/EMF/LF Blocking ,Super Earthing/Grounding Fabric/Anti-electrostatic/ESD /Radiation/Radiowave/Microwave Shielding Electromagnetic Fabric. Very easy to cut and sew .Usage for Bags, Curtains,Tents,etc.Effective Shielding for CellTowers,Microwave Signals,Phones,Smart Meters,Security Systems, Radar, Military Broadcast, etc and More. Making Anti-static Cloth, Wireless Meter Shielding, E-textiles, Shielding Curtain, EMP and EMI Radiation Reduction. High-shielding Conductive Fabric for Blocking RF Signals Such as Cell, Bluetooth, WiFi, GPS. As an Insert in the Wallet or Handbag to Protect Your Credit Cards from Data Theft.Products from He Wei's store 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-Minnanxin