What is the purpose of a gusset? What are the gussets in the bag?
Gusset Style Bags - SorbentSystems.com
Gusset Bag | Form Fill and Seal, Pillow Bag, Doy Bag, UK,
Gusseted bags for packaging – Cuymer
Shiny White Side Gusset Bags No Zipper
Plastic Bags with Handles & Bottom Gusset - Opaque – Prime Line Retail
Amazon.com: Kraft Paper Stand Up Coffee Bag/Side Gusset Pouch with Flat Bottom Coffee Beans Pouch with One Way Degassing Valve, 50 Pieces (Natural Kraft, 500g, 16oz, 1lb) : Industrial & Scientific
Wide Gusset Takeout Bag Natural Kraft | ReuseThisBag.com