This has got to be the coolest RFID shielding wallet-pouch!
Choose when the digital info on your chipped passport and credit/ID cards is ‘on’ or ‘off’. Wrapping yourself in aluminum foil isn’t enough! The kinds of radio waves used with RFID are tricky and can penetrate all sorts of things—it’s a matter of power and antenna size. On a quest for a modern-day magic shielding cloth, I discovered how to make an effective, rigid pouch on the cheap.
Sweet bonuses for the skull and crossbones and jolt cola aluminum on the inside! – Link