BLACKHAWK! Under The Radar 61SC17BK RFID Sheilded Laptop Sleeve, 17-Inch Incorporates zero trace signal blocking technology Protects electronic devices from remote exploitation by blocking incoming and outgoing signals Helps prevent tracking of devices Shields against unwanted reading of RFiD technology found in U.S. Passports, driver's licenses, ids and credit cards Constructed of 1050 denier Nylon