Suitable computer size: 15.6/16.1 inches Computer bag size: length 31cm, width 15cm and height 41cm. 1. Convenient charging port design. The side of the backpack is provided with a convenient charging port to continuously battery the mobile phone when going out. 2. Choose Oxford fabric, and choose Oxford fabric for backpacks. The material is thickened and has the characteristics of softness, lightness, wear resistance and durability that other fabrics can't match. 3. Safe zipper bag on the back, specially designed zipper bag on the back, which can be put into valuables and placed close to the body, safe and reliable. 4. Large-capacity travel assistance. The large-capacity main bag is designed to cooperate with multiple external bags, which can support the accommodation of items needed for 3-5 days of travel and give you intimate companionship. 5. Practical back tie strap, the back of the backpack can be attached to the luggage case, and you can push it when you are tired.More relaxed, convenient and practical.