A three-side sealed bag refers to a type of bag sealed on three edges, suitable for various food items, tea bags, chemicals, vacuum-sealed products, and commonly seen in packaging for facial masks. It often comes with various types of hanging holes and tear notches for convenient storage and display by consumers. Additionally, the three-side sealed bag can also be equipped with a zipper for reusability, widely used in food packaging, candy packaging, dried grains, etc.