There are many types of paper bags. The brown kraft paper bag is one type that is made of 100% recycled paper. This bag is strong and can carry a lot of weight. It is often used for carrying groceries or other heavy items. The paper for this bag is made from wood pulp. The wood pulp is bleached and then formed into paper. The paper is then cut into the shape of a bag. A brown kraft paper bag can be recycled.