The Ridge RFID Blocking Carbon Fiber 3K Cash Strap: New / Sealed. 

Features
Holds 1-12 cards without stretching out
Blocks RFID to prevent wireless theft
Scratch resistant
Replaceable screws and elastic
Carbon Fiber 3k Weave | Premium Grade Matte Finish
Weight: 1.6 oz | 86 x 54 x 6 mm
The Ridge is a minimalist, RFID-blocking wallet. The main cardholder uses elastic to expand to hold up to 12 IDs and credit cards. The typical leather bi-fold gets packed with faded receipts and unnecessary cards, resembling something more like a suitcase rather than a wallet. The Ridge is minimalist without being limiting. It’s about carrying less but always having what you need.
Cash Strap: A thin and versatile elastic. Ideal for carrying: cash, ID's, or RFID-enabled cards.