6891 Napa Gold Air Filter (46891 WIX) High grade plastic wallet with aluminum shell. Integrated RFID repellant technology protects you from Credit-Card scanning thieves. Seven secure slots fold out accordion style and hold up to 9 cards. Rounded corners Wouldn't cause damage to your clothers. Weather and water resistant & Puncture and tear resistant Shields the following types of cards: All new contactless credit cards, Enhanced Driver's Licenses such as New York, Washington, Michigan, and Vermont, Many transit cards such as the DC Metro and Boston CharlieTM card, TWICTM (Transportation Worker Identification Credential), HID iClass, HID MIFARE, HID FlexSmart, DESFire, Indala FlexSmart, Any card ISO 14443A/B or ISO 15693 compatible, All MIFARE and DESFire compatible cards, sQuid cards used in Europe, Military CAC (Common Acess Cards), New Government PIV (Personal Identity Verification) cards such as the Linc-Pass, New long range RFID EPC Gen1/Gen2 cards