Product Description Backpack Material: Made of high quality breathable shock absorbing material with smooth metal zipper. Backpack structure: The main compartment can hold multiple books and other supplies; several small pockets can hold mobile phones, pens and other small items; can put water bottles and umbrellas in 2 outer pockets as you like; 1 front pocket can hold magazines, Glasses, wallets, keys, headphones, power banks, mobile phones, documents, etc. Backpack size: 40*20*30cm. Can be used as school bag, hiking backpack, travel bag, work bag, etc. Backpack Design: Made of breathable shock-absorbing material on the back, durable and breathable. Soft shoulder straps provide good shoulder protection. It can also be used as a tote with the top handle. Padded, adjustable shoulder straps and back for extra comfort. Adjustable shoulder straps provide optimum comfort and fit snugly against your shoulders for extra comfort on your shoulders.Product capacity 1、Large-capacity interior, reasonable partition, small body and large capacity, can hold textbooks, pencil cases, water cups, etc.2、Internal display. Large-capacity main pocket and convenient side pockets in the front pocket provide logical storage and keep what you need at your fingertips.Product advantages I share your weight. 3D carrying system, stable and balanced strength, close to the back to reduce the feeling of carrying.Product details ① Thickened shoulder straps ②High-strength plastic buckle ③ Chest strap buckle ④Shoulder strap adjustment buckle