Stand pouch is a type of flexible packaging which is able to stand erect on its bottom for display, storage, and use. The bottom part of a stand-up pouch is gusseted to provide support for display or use. The flexible pouches are usually constructed of multi-layer materials: various plastic films, paper, foil, etc. Pouches are often printed with high-impact graphics or sometimes have attached labels. The materials must have specialized heat-seal properties to allow conversion into pouches.