Material: Canvas Features :    - Made from durable fabric and featuring a reinforced bottom, which is Light-weight Carrying and perfect for business traveling, weekend getaways, school, shopping, and other outdoor activities in daily life.    - External USB with built-in charging cable offers convenient electronic device charging anywhere. Designed for Micro-USB products.    - Compartments offer a separate space for your Laptop, iPhone, iPad, passport, pen, keys, wallet, watch, charger baby, Mp3, 4A file, books, clothes, umbrella, bottle, and more. Easily find what you want.    - Two side sealed pockets provide a more sturdy and secure load than other mesh pockets.    - Soft-lined laptop sleeves hold laptops less than 15.6 inches, offering enough space and comfort.    - Included metal zippers which is theft proof and reliable, protecting wallet and other items inside from thief and offering a private space.Utra Protective: This Backpack apply anti-theft design technology. Zipper of main pocket is fully hidden in the back of this bag, no theft will easily open your backpack, makes your valuables more safer.This is a safe backpack for you to walk in the night Apply high quality EVA material, back of this backpack will not change the shape even in a heavy carry, which will protect your back and your laptop. Very comfortable to carry and it's so ventilate, you will never feel hot by carrying this anti- theft backpack.Multiple Compartments: Most of your living necessities can be held inside, such as keys, wallets, cellphones, books, 15" laptop, etc.You also can fix it in a suitcase.Note:All products are photographed with guaranteed quality.Due to differences in display and lighting effects, the actual color of the project may differ slightly from the color shown in the image. Thank you.Due to manual measurement differences, the measurement deviation should be 1-3cm. All goods included in this product are based on the actual received goods.