This Wallet from Paper Wallwts is designed around the priciples of origami. Made from one sheet of TYVEK, the Ultra-stong material that stretches to suit your needs.
 
This wallet has the art of Toyoki Adachi and is based on the NOW ART being turned into the NO WAR TEXTILE, 
 
TYVEK seemless construction
Note sleeve
2 card pouches that each are capable of holding several cards
further storage formed behind the card pouches 
You can even use each end of the wallet as storage.