Backpack is made of nylon material. It is easy to clean, can be used repeatedly and not easy to deform. The opening and closing zipper can hang some small objects you like.This school backpack has excellent breathability and warmth department and is equipped with two shoulder straps with pads that can be adjusted or disassembled freely can.Closure: ZipperCasualBackpacks for boys and girls can adjust their length to suit your height and body shape, relieve shoulder pressure and Don't make your body notice and discomfort.Student backpacks can help organize the contents, make your bag tidy and clean, simplify your life, and side pockets can be used to store water bottles and umbrellas Backpack for women and men can store clothes, A4 books, other daily necessities, which is very suitable for schools, office, shopping, camping, traveling and daily use.