Courier bag Specs: all size, Color: Up to 10 color Certification: FDA, SGS, ROHS... Courier bag Packaging: secruity ,high-strength ,hot-melt adhesive closure provides additional temperature resistance and assurance for mailing items1.durablity ,multi-layer ,co-extruded film provides optium protect against moisture,punture and tear ,especially for heavier items. 2.secruity ,high-strength ,hot-melt ...