Designed with a simple folding pattern that reduces the number of seams and strengthens the wallet allowing it to expand and grow as it is filled. Made with the amazing water and tear-resistant Tyvek (think express mail envelopes), the smooth material creates the perfect moisture-resistant surface that will protect your valuables from the wear and tear that destroys normal stitching or leather. These wallets are made from 25 percent post-consumer recycled content. Size: Open 8 w x 3 1/4 h