Protect your credit cards containing radio-frequency identification chips with this woven metal, shielding fabric. A convenient fat quarter just the right size to make protective sleeves or sew into wallets and purses to guard against RFID skimming and information theft. Great for travelers! Please note, this fabric is made from metal fibers and will dull your best fabric shears, so please cut with paper or craft scissors. FAT QUARTER Radio-Frequency Identification Blocking Fabric, 23% copper / 27% nickel / 50% polyester, shielding efficiency 99.99%. Do not iron, no bleach, hand wash or clean with wet tissue, cool water.