Since snack foods typically require higher barriers to keep them fresh, coated poly or metallized materials are normally used. For some products that have high turn over rates or that are shelf stable as-is, standard poly materials can be used to save cost. With so many different materials and thicknesses available, choosing the right one for a particular product can be confusing. Many new manufacturers follow the trend of the industry when choosing packaging for their products. For example, many potato chip companies use metallized materials for their bags.