CAPACITY AND POCKETS:17.3 x 11.7 x 7.5 inch,25L.Main compartment roomy for binder,ruled paper,notebook,pencil case,subject,books,clothes,water bottle,lunchbox,other school supplies.Padded laptop compart with velcro fits 13 to 16 inch laptop.Organized compartment and Front pockets for pencil,keys,mouse, headset,ID card. USB CHARGING PORT:The school backpack comes with built in USB charger outside , built in charging cable inside, offers you a convenient way to charge your phone when you are walking, riding. WATERPROOF AND BREATHABLE:Girls schoolbag is made of water-resistant fabric,in light rain, the contents of the bookbag will not get wet.Shoulder straps have soft and breathable sponge to effectively reduce back pressure. FEATURES AND DETAILS:Featuring the trolley belt on its breathable back, business traveler could fit bookbag right on the luggage suitcase, which free your hands.Anti-theft pocket on the back is very convenient for storing keys, credit cards, cell ph