Why is there a lining of wax on an oatmeal package?

The lining of wax on an oatmeal package serves primarily as a moisture barrier, helping to keep the oats dry and fresh. This wax coating protects the contents from humidity and prevents spoilage, ensuring that the oats maintain their quality and flavor. Additionally, the wax lining can help seal the package, preserving the integrity of the product during storage and transportation.