A Kraft bag is a type of paper bag that is usually made from brown Kraft paper. Kraft paper is a type of paper that is made from wood pulp. The wood pulp is bleached with chemicals, and then the paper is formed. Kraft paper is usually used for packaging because it is strong and durable. Kraft bags are often used for shopping bags, because they can hold a lot of weight. They are also often used for packaging products such as food, because they keep the food fresh. Kraft bags are also recyclable.