The paper sack is a type of packaging made from paper, usually kraft paper. Paper sacks are commonly used to package materials such as flour, sugar, rice, and other dry goods. They can also be used for packaging things like potting soil, animal feed, and other products that need to be kept dry. Paper sacks are usually made with a square bottom and two side gussets. The bottom of the sack is glued or stitched shut, and the top is usually left open. The side gussets allow the sack to expand when it is filled with product. Paper sacks are typically printed with the name of the company and the product that they contain. They may also have other information printed on them, such as the weight or volume of the contents. Paper sacks are generally recyclable and are often made from recycled paper.