Made Of 300D Polyester With 210D Polyester Lining | Inside Clear ID Window, 3 Card Slots And Large Pocket For Cash Or Receipts | Place Your Credit Cards In Wallet And Close To Prevent Cyber Hackers From Stealing Your Identity | Prevents Data Transfer Between The Wallet And Reader | Works With Any Contactless Chip Card. Cards That Are Swiped Do Not Send RFID Signals And Will Not Be Protected By An RFID Blocker.