This back pack opens fully clam shell, and is able to stand up on its own. While having the durability and toughness of Yeti. The demands of the everyday call for a durable pack dedicated to just that. This Backpack is 23 liters of thoughtfully designed rugged materials to keep you organized, keep what you need accessible, and still be comfortable enough to wear on any commute. Durable, 1000D Nylon material lined with 420D Nylon ripstop ensures you can take on the day.