The RFIDsafe TEC Sleeve is made using RFID-blocking material to help protect against identity theft and scan scams. Featuring an external slot for frequently used cards (fits 4 to 5 cards) and a main pocket. Materials(Outer material) Polyurethane, (lining) Microfiber Weight0.22 lbs / 100 g Dimensions(H x W x D): 4 x 2.8 x 0.1 in / 10.2 x 7 x 0.3 cm Patented InPatents pending.