Features:1.Made of soft electromagnetic shielding material-aluminum foil,its function is to eliminate electromagnetic interference (EMI), shielding electromagnetic radiation damage to the passport. Also have airtight, light insulation, anti-static, anti-RF function.2.Avoid passport or other magnetic disappearance information leakage.3.Extremely lightweight and flexible; our sleeves won't add bulk or weight.4.The function is to eliminate the damage of electromagnetic radiation to the IC card. At the same time, it has the functions of air tightness, light isolation, anti static frequency.5.Extend the useful life of smart ID cards.6.Aluminum foil ferrule is made of soft electromagnetic shielding material.Scope of application:1. It is suitable for anti-electromagnetic interference of various ID cards;2. It is suitable for preventing various non-contact IC card chip circuits from being damaged, preventing information leakage and information theft on non-contact IC cards; avoiding the loss of information on IC cards.Note: 1.The back of this sleeve is blank, you can stick decorations at here.2.The color of the item may vary slightly due to photography and your own computer.Specification:Materail: Aluminum foilDimension: 134x105mm/5.27x4.13inch(LxW)Color: Silver Card Holder & Blue LogoWeight: 22gPackage included:5 x RFID Blocking Sleeves Passport Holder