There's no need to carry a separate wallet when you have the Peak Design Smartphone Slim Wallet in midnight. The Slim Wallet uses a strong magnetic connection to attach to the back of your MagSafe-compatible phone or case. Additional magnets are used in the wallet's flap to help keep your cards and identification secure inside. The wall has room to hold up to 7 cards, which can be deployed fast with the integrated quick-pull tab. The wallet is made from a durable nylon canvas material, helping it stand up to the rigors of daily use.