Inspired by Israeli Defense Force standard issue field duffles, this bag is decidedly not standard issue and is perfect for any mission. Nearly indestructible 18 oz. Martexin Wax Canvas twill exterior provides ballistic strength structure and a patina that only gets better with age. The interior is handcrafted of soft black canvas material. The closure is an imported heavy gauge $22 a piece RiRi Aquazip water resistant zipper. The adjustable and removable shoulder strap uses solid steel hardware commissioned from a US military supply company. Full-grained Horween Austin Calf leather pocket, trim and strap handle are first chromium tanned, which makes the leather supple and durable, and then re-tanned with vegetable tannins — derived from tree leaves, bark, and other plant material — to allow it to patina well and to be easily shaped. You can pick one of these stunning pieces up now at Defy.