Bags are sections of material or fabrics that are utilized to carry objects. Bags can be any variety of sizes, colors and shapes.
About Duffels:
Duffels are rectangular bags with handles and typically a shoulder strap. Duffels are often made of nylon or leather and used for short trips or commonly used as a gym bag.
About Metal:
Metal is a strong, shiny material that can be molded and shaped in any way and is often used as a decorative ornament in garments and footwear.