Main material: 90% High density cotton canvas 10% PU Leather， it's a very durable backpack. Structure: 1 Main zip pocket, 2 front zip pockets and 1 side mesh pocket. There is 1 shoulder strap. Dimension: Approx 12"L x 18"H x 7" W. It's about 30 L. It can fits most 15 inch laptop.) Multi-purpose uses: This bag can used as duffle/handbag/suitcase/brief case when travelling. Two durable straps are in a hidden compartment to make this bag a backpack/rucksack/satchel. A detachable shoulder strap can easily turn the backpack into a messenger bag/crossbody bag/mail bag/shoulder bag. One bag offers at least three different ways of carrying. Key Features: - 100% Brand New, awesome backpack that you will love it as soon as you get it. - Zipper closure, it's easy to get what you need in the bag. - Integrated breathable mesh pad in the back,breathable and not muggy. - Padded shoulder straps will make your shoulder comfortable. - Large capacity will allow most of your necessaries could be stored. - A special inter layer designed for your laptop(Fits most 17 inch laptop). - It's a very good backpack for working, traveling, hiking, camping, college, school and everyday using. - Warranty: All of our bags have 1-YEAR WARRANTY. Any problems with your bag, please contact us. We will solve it. What you can put in this backpack? - You can put clothes, 17" laptop, A4 books, ipad, glasses, wallet, keys, earphone, power bank, cell phone, water bottle and document in the bag. How to maintain the backpack? - Wash it with clean water in ordinary temperature. - DO NOT wash it with hot water and alkaline detergent. - Hang to dry and store in ventilated place instead of sun exposure. - Wash separately to avoid staining. About ibagbar: ibagbar is founded by a genuine group of the 80's and 90's generation.