... 4.Polyester,Canvas,PU/PVC,Satin,Non-woven,Knit large front zipper pocket school boy book bag folding backpack Description:Material: co-friendly material, non-woven fabrics, ... the order.Packing & Delivery:Packing details: 1per/opp bag, 50-200 pcs/ctn, Your requests about the ... , good air permeability, non toxic. Low resistance and large dust retaining capacity. Urable, reusable, washable.pls send ...