Whether you are outdoor going hiking, camping, traveling, backpacking, or in everyday occasions such as school, work, adventure, shopping, etc, this multi-function classic design bag will make your experience more enjoyable and convenient then ever! Made with high quality and durable tear and water resistant material, it features a zipper closure large spacious main compartment with 1 large inner pocket to store your outdoor activity essentials. There are 2 front zipper closure pockets, one larger with anti-theft design and dual zipper to store your valuables such as wallet, iPad or laptop, and a smaller one for small accessories. The padded and breathable mesh back panel offer cushioned comfort, while also promoting air circulation along your back. This bag can be used as a backpack, a messenger/shoulder bag, or a duffel bag. To use it as a messenger/shoulder bag or duffel bag, just use the detachable and adjustable shoulder strap, or grab the sturdy handle on the side. To use it as a backpack, simply unzip the dual zipper closure hidden compartment on the back, roll it up and secure it with the Velcro, and the 2 padded, breathable, and S-shaped shoulder straps that spread loads better across your shoulders are revealed. There are 4 adjustable durable buckle straps on the sides for side compression purposes or to attach?bulky gears to the outside of the?bag. There are also 6 attachment rings (2 plastic on the side for detachable shoulder strap, 1 plastic and 1 metal on the front, 2 plastic on shoulder straps) and 1 metal detachable carabiner hook ring to link or attach extra pockets/items for you convenience. 2 more handles are on the front of the bag for easy handling and lifting.