School backpacks, Yiwu Chaopai Bags: green material , high quality , reasonable price , various styles . School backpacks, Yiwu Chaopai Bags : green material , high quality , reasonable price , various styles .1)Material :600D polyester with pvc backing2)Color : as customers requirements3)Size and design : as customers requirements4)Logo : we are according to your requirements5)two shoulders6) ...