ZPYESWOW Day Backpack for Travel Underseat Carry on Backpack 。The size of the carry on backpack is 18.3*12.5*7.2inch. The travel backpack has a 40L large capacity and 4 main compartments, which can meet daily and travel needs. The travel backpack for women\'s main compartment can store a lot of things, including 5-8 pieces of clothing, shoes, books, and many other items. The separate laptop compartment is padded with EVA foam to provide the best protection for your 17\" laptop and 12.9\" iPad. The front compartment has many pockets to keep your belongings organized USB Charging Port & Anti-Theft Pocket: This suitcase backpack adds a USB charging port design,uses a data cable to connect the power bank inside the backpack and the mobile phone outside,offers you a more convenient way to charge your phone(power bank NOT included). A hidden anti-theft pocket located on the lower back protects your valuable items, such as wallet, passport, ID card when traveling or lining up