Capacity; 20-35LInner structure of the bag: zipper pocket, computer pocketOpening method: zipperGender binding: femaleMaterial: NylonFunction: waterproof, wear resistant, reducing loadHardness: medium to hardPattern: flowerLining text: polyesterMain strip number: double rootPopular items: flowersCarrying parts: soft handle BracketsSize: 18 inchWith 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 wearThis 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.