Review on Superior Pocket Blocking Wallet Shielding for Minimalists by Ross Decoteau

That's exactly what they claim. It's definitely different, I've never seen it before. At first I wanted to send it back. After playing around with it, I became a believer. It's harder than I thought. He is holding a bundle of credit cards. I carry almost 20+ cards and used to use a thick rubber band that lasted a week or two. The more cards it has, the easier it is to use.