Come and see our amazing products. The backpack is made of oxford cloth and polyester, which is quite durable. Larger roomy compartments can provide separated space for computer, iPad, A4 files, wallet, clothes, power bank and more your items. Bag internal structure: zipper pocket, mobile phone bag, ID bag, sandwich zipper bag. Capacity: 36-55L. A luggage strap is quite convenient for you to fix the laptop bag on the trolley of your luggage, making your journey and traveling more convenient wherever you go. It is perfect for advertising and promotion, trade show, shopping center and supermarket. Pls confirm further with us if any query about packing info, inventory status and time schedule.