Side gusseted bags are named for the gusset, or fold, on either side of the bag. The gussets expand when the package is filled with product, and the weight of the product usually holds the bag upright. This package format has two long faces, or panels, on the front and the back for product branding. The side gusset bag is the recognized format for coffee packaging today. It is also widely used in other markets such as, pet food, powders goods, teas and other specialty food products.