... used for your design?A. Polyester bags (lower price,durable to use)B. Nylon bags (softer hand-feeling, ... ,durable to use, especially suitble for briefcase laptop bags,etc.)D. Pu (higher price, much more ... classic, suitble for laptop bags,messenger bags,etc.)E. Polyester/Nylon + PVC/PU (more ... 4, what factors will affect the price of bags?A. Size:The larger size, of couse,larger ...