Driving Wallet Black W Tan. Designed to eliminate unnecessary bulk, the Driving Wallet slips perfectly into a pocket without compromising the silhouette. Each wallet is entirely hand stitched using a "saddle stitch" technique that ensures maximum durability and repairability. If you look after your Sonder Leather wallet, it will last you a lifetime. Product Details: Designed to hold 8 10 cards comfortably Room for folded notes Develops a rich patina with age and use Measures 100x75mm when shut Leather & Materials Weve chosen full grain, vegetable tanned kangaroo leather for its beauty and strength. This leather is tanned using tannins from tree bark, and develops a rich patina over time which is completely unique to the owner. The Driving Wallet is saddle stitched using waxed polyester thread for maximum longevity.