... . Size:Open---28*40*11cm; Fold---8*12*4cm promotional polyester folding backpack 1. Product Description: Item No.:BBPC004Material:190T/210D ... lead, EN71 based on client's request.c. Optional material: polyester, nylon, canvas, non woven, microfiber, satin, PVC, PU etcd. Products ... best quality and best service.5. Production Flow Chart: promotional polyester folding backpack