🎒【SUITABLE SIZE】Backpack size: 47cm*34cm*18(25)cm(18.5"*13.4"*7.1"(9.8")). Weight: 1kg/2.2lb.Suitable for 17/15.6" laptops.(The upgraded version adds a side cup pocket and the fabric is thicker). 🎒【LARGE CAPACITY】The backpack has an expandable design. When you travel and need to carry a lot of clothes, you can open the expansion zipper, so that you can get a backpack with a capacity of about40L. 🎒【USB CHARGING PORT】The side of the backpack has a USB charging port, which is connected to the power bank, which can easily charge your mobile phone when you are on business and travel. 🎒【WATER RESISTANT】PU coated fabric is soft and skin-friendly, but also better waterproof. 🎒【LUGGAGE STRAP】When you are on business and traveling, you can put it firmly on your suitcase, very convenient. 🎒【MULTIPLE OCCASIONS】The side of the backpack has a handle that attaches the shoulder strap to the back of the suitcase strap. It can also be used as a suitcase. Whether you are on a business/travel/daily trip/work/university, etc., it is perfect. 17/15.6"Business laptop backpack