Stewart/Stand RFID Blocking Slim Minimalist Silver Wallet Wing With ID Window PATENTED ORIGINAL  Add RF blocking features to any wallet. Design, material, and technology. Your wallet will look and work as a SHIELD while being soft, flexible and completely unique. SECURE. VERSATILE RFID BLOCKING  Certified independent lab tests (ISO 15693). Advanced security and blocks personal data at the 13.56 MHz Frequency while allowing quick passage of proximity cards at 125 KHz Frequency. MINIMALIST. SLIM PROFILE  Reduce bulk. Card Case is .1" plus the thickness of your cards and cash. Thin, light, and durable. Silver ballistic nylon; narrow profile