Flip! Backpack feature fun ,childlike and sporty character Usage : This backpack has plenty of room with so many pockets . It will be perfect as medium size travel bag or school bag for kids. Material: Thick and durable polyester fabric (outer material),420D nylon fabric (for lining),Ykk zipper, polyester strap, nickel hardware, foam Dimension:11.5inch(width) 15 inch(length) 5 inch (depth) Weight: 650 g. Exterior : The front flap enclosed with zipper. There is 1 small zip pocket on the flap .There is large zip pocket in front panel (open from the side) with 1 key holder inside. There is 1 large zip pocket at the back panel(open from the side) that you can put some thing flat like IPAD or paper document. Interior : There is 1 zip pouch that is detachable with the snap button .There is large mesh zip pockets (front panel)which is useful as you can see through the stuff inside . there are some other pocket for organizing at the back panel as well .