This wallet by the company Paper Wallets uses a stunning new material that is as thin as paper but super strong. Whilst it starts super thin, the wallet can expand and grow the more you put in it.
The essential design is based around that of Origami and the wallet is made of one sheet of ultra durable TYVEK 
This model has full RFID security built in to prevent any theft of data from your wallet.
This model has the Artwork of David San, Barcelona