Material: Metal Shielding FoilSize: 5.8 * 8.8 cm for CardSuitable for all kinds of magnetic contactless IC cards:Identity Card, Debit cards, Credit Card, Subway cards, Driver&x27;s license, US resident green cards, Employee&x27;s Card,ect.Package Included: 1 pcs RFID Blocking SleevesShipment: WorldwideFunctions:1. Protect your magnetic cards from EMI (Electro Magnetic Interference) damage,which would caused information lost.(This happens a lot if you put your card near your cellphone too often.)2. Protect your contactless IC cards information from being stolen, including Identity Card, Credit Card, Employee&x27;s Card,ect.3. Protect your contactless IC cards chips from damage by weather and water-resistant.4. Prevents electronic pick-pocketing.