Big storage capacity with multi pockets:1 large main pocket with 1 zipper front pockets.2 mesh pockets for water bottles;1 special pencil case which can hung on the backpack;1 lunch bag with adjustabel straps which can be as shoulder bag or a handle bag. Boys Rolling Backpack Size:backpack:16.5"x11.8"x7.5",lunch bag:9"x8.2"x4.3",pencil case:8.6"x3.9"x2.3",highest height of trolley is 31.5";Multi-function for kids,as a luggage to reduce load,or as a backpack,or a handbag with a handle on the top of backpack. Noiseless 4 wheels design with high-strength aluminum alloy rod,not only ensure you can wheel it smoothly,it makes wheel it easily and naturally. High quality Nylon material made,water resistant and durable.designed breathable back and padded shoulder Straps,they greatly reduced the the pressure in the back and shoulder.(This rod and the bag can't be removed ,please note) No matter you are teen girls,boys,or women and men,go to school,company,outside sports,or a travel,you can choose one to used in any place you want to carry your laptop,books,etc.Fits for Primary school students Manufacture Minimum Age:6 Years Old