DIMENSIONS & DURABLE MATERIAL: Size of extra large laptop backpack: 12(L)x8.5(D)x17(H) inches. Made of sturdy lightweight fabric, nylon lining, and sturdy hardware. Comfortable, spacious, and breathable back mesh and shoulder straps, as well as abundant sponge pads, help relieve shoulder pressure. Women's premium business travel bag, men's computer backpack FLIGHT APPROVED: The 180 degree zipper closure of the travel backpack can help you quickly pass through security checks. Suitable for placing overhead luggage racks or under seats. This portable backpack makes your journey more enjoyable and convenient LARGE CAPACITY: This travel backpack has many different pockets, including a main pocket, wet clothes pocket, stationery storage pocket, separate computer storage pocket, bottle pocket, umbrella pocket, anti-theft pocket, and zipper pocket, making your items organized and easier to find. Can accommodate many things, such as university supplies, travel accessories, clothes, laptops, 13 inch MacBook, 14, 15, 15.6, 17 inch laptops, wallets, etc., university backpacks