A sustainable card holder made from recycled Ocean Bound Plastic from Plastic Bank®. Old bottles and other stray plastic products were used for the material. The ultimate, minimalist card holder. Suitable for storing 7 cards. Walter Wallets are ultra-thin card holders made from recycled materials. Your cards are also safely protected with the patented Stack-and-Slide system. With the Walter Wallet you take out your cards in one hand and you can see exactly which card you need.