1. Enough space: the biggest pocket can accommodate your laptop computer for additional pockets such as laptop accessories, such as tablet computers, mouse, MacBook mouse, mobile phone, headset, pen or memory card. It also provides enough space for the document. 2. Ultra -humid and lightweight: thin, light and convenient. Two ways to carry: it provides a mobile shoulder strap, which can be used as a shoulder strap or handbag according to need; the hidden handle band can be hidden. If you want to hide your shoulder, you can easily slide it into the backpack. Used for your daily use or business travel. It is suitable for men and women 3. Inner velvet, earthquake resistance and fall, delicate velvet lining ensures that the computer is not scraped 4. Waterproof fabric, waterproof polyester, abrasion resistance, scratch resistance, sweat avoidance, durable 5. The backbone band design on the back, simple travel, go if you want to go