Flat Bottom 4 Corner Bags use materials such as metalized films or non-metalized options that act as barriers against oxygen, moisture, and light. This helps to preserve the product’s freshness and extend its shelf life. The airtight seals and protective materials ensure that the contents remain sealed, reducing the risk of contamination or spoilage. This makes them ideal for products that need to stay fresh over time, such as snacks, coffee, and other perishable items. Email us at info@unifiedflex.com, to find the right packaging solution for your product!