Capacity; 20-35L Inner structure of the bag: zipper pocket, computer pocket Opening method: zipper Gender binding: female Material: Nylon Function: waterproof, wear resistant, reducing load Hardness: medium to hard Pattern: flower Lining text: polyester Main strip number: double root Popular items: flowers Carrying parts: soft handle Brackets Size: 18 inch With external USB charging port, convenient for mobile phone, Bluetooth headset and other electronic devices, the multifunctional bag is equipped with external USB charging port. Using the charger, you do not have to hold it in your hand. You can directly put the charger into the bag to connect the internal socket, and when charging your phone, you can easily charge it by inserting the external socket. (With detachable USB charging cable) High quality material and comfortable to wear This outdoor backpack is made of high density nylon, with bionic lotus leaf technology on the surface, which has excellent waterproof and can protect your luggage inside in rainy days. you can adjust the size of the backpack, 2.75 inches in a mesh, breathable shoulder strap, and left and right shoulder and waist protectors. reduce the pressure of backpack objects on the shoulders, long use is not tired.