Come and see our amazing products. It is made of polyester, with a large main compartment for books. With hidden zipper, it includes padded shoulder straps and hanger loop. The front zipper allows you to hold more things, such as toys. There is a 5 MM thickness PE foam in the shoulder straps and backside, more comfortable when loaded heavy stuffs. Your logo are welcomed to imprint or embroidered on the front. It is a good gift for schools, children and teachers. They will thank you for your kindness. It is a public benefit activities, meanwhile children's parents will have good impression of your company. Pls confirm further with us if any query about packing info, inventory status and time schedule.