Under what circumstances should the jumbo bags be coated?

jumbo bag

Generally, powder objects are easy to be affected with damp and need moisture-proof products. the jumbo bag needs to be coated, and the coating needs to be better inside jumbo, which is not easy to wear out.

Generally, products transported by sea are coated.

Jumobag’s mouth is coated with a film to appear bright, and the bag body is rough without coating.