Designed after simple military-style courier bags of yore. The medium-sized bag has a very simple sturdy riveted design. There are multiple rivets holding the flap to the top of the bag. The asymmetrical D-shape has a spacious interior with two interior pockets. There is one exterior side leather pen pocket and a large raw leather snap closure back side pocket. The interior pockets and liner are made with authentically replicated Vietnam-era tigerstripe cotton twill made in Japan. The bag is made with our vegetable tanned organic Italian horsehide, with heavy Herman Oak vegetable tanned steer strap leather for the heavier tabs and re enforced pieces in a lovely tone on tone look. The bag flap is double layered horsehide.