Wealth of Knowledge Wallet
charts | reference | tyvek | wallets
This Tyvek Mighty Wallet is nearly impossible to tear. It’s also mighty useful. It’s covered with useful information, like conversion charts, a protractor, geometry and physics equations, and more. Its edges provide inch, centimeter, and pica rulers too. As a wallet, it’s quite functional, too, with multiple card slots and a long main compartment for bills or receipts.